| Acontius ... Acre, Plain of |
| | - Acontius
- in Greek legend, a beautiful youth of the island of Ceos. During the festival of Artemis at Delos, Acontius saw and loved Cydippe, a girl of a rich and noble family. He wrote on an apple the words "I swear ...
- Acontius, Jacobus
- advocate of religious toleration during the Reformation whose revolt took a more extreme form than that of Lutheranism. [1 Related Articles]
- Acorales
- the sweet flag order of flowering plants and the most basal lineage among the monocotyledons (monocots), which are characterized by having a single seed leaf. This order contains the single family Acoraceae and one genus (Acorus), which comprises two to ...
- acorn
- (from the article "oak") Acorns provide food for small game animals and are used to fatten swine and poultry. Red- and white-oak lumber is used in construction, flooring, furniture, millwork, cooperage, and the production of crossties, structural timbers, and mine props.uses
- acorn and nut weevil
- any of approximately 45 species of weevils in the family Curculionidae (order Coleoptera) that have extremely long and slender snouts, which in females can be almost twice the length of the body. The mandibles are located at the tip of ...
- acorn weevil
- (from the article "acorn and nut weevil") any of approximately 45 species of weevils in the family Curculionidae (order Coleoptera) that have extremely long and slender snouts, which in females can be almost twice the length of the body. The mandibles are located at the tip of ...
- acorn woodpecker
- (from the article "woodpecker") The acorn woodpecker (M. formicivorus) is about 20 cm (8 inches) long and is found from the deciduous woodlands of western North America south to Colombia. It depends on acorns for winter food, storing a supply in ...
- acorn worm
- any of the soft-bodied invertebrates of the class Enteropneusta, phylum Hemichordata. The front end of these animals is shaped like an acorn, hence their common name. The "acorn" consists of a muscular proboscis and a collar that may be used ... [3 Related Articles]
- Acorus
- (from the article "Acorales") ...plants and the most basal lineage among the monocotyledons (monocots), which are characterized by having a single seed leaf. This order contains the single family Acoraceae and one genus (Acorus), which comprises two to four species of plants that resemble ...
- acosmism
- in philosophy, the view that God is the sole and ultimate reality and that finite objects and events have no independent existence. Acosmism has been equated with pantheism, the belief that everything is God. G.W.F. Hegel coined the word to ... [1 Related Articles]
- Acosta, Carlos
- (from the article "Performing Arts") ...toured with the title Elsinore), based very loosely on the story of Hamlet. Other notable events were a gala to celebrate the 80th birthday of Yury Grigorovich, the debut of guest star Carlos Acosta in the title role of Spartacus, ...
- Acosta, Joaquin
- Colombian scientist, historian, and statesman who sought to preserve knowledge of his country's early history.
- Acosta, Jose de
- Jesuit theologian and missionary to the New World, chiefly known for his Historia natural y moral de las Indias, the earliest survey of the New World and its relation to the Old. His works, missionary and literary, mark the end ...
- Acosta, Uriel
- freethinking rationalist who became an example among Jews of one martyred by the intolerance of his own religious community. He is sometimes cited as a forerunner of the renowned philosopher Benedict de Spinoza. [1 Related Articles]
- acouchy
- either of two species of South American rodents that resemble the small tropical-forest-dwelling hoofed animals of Africa and Asia (see royal antelope; chevrotain). Weighing 1 to 1.5 kg (2.2 to 3.3 pounds), acouchys are 30 to 39 cm (12 to ... [1 Related Articles]
- acousmatics
- (from the article "Pythagoreanism") ..."something heard," viz., the esoteric teachings) and mathematikoi (Greek: mathematikos, "scientific"), may have occurred at that time. The acousmatics devoted themselves to the observance of rituals and rules and to the interpretation of the sayings of the master; the "mathematics" ...
- acoustic absorption
- (from the article "Absorption coefficients of common materials at several frequencies") In addition to the geometric decrease in intensity caused by the inverse square law, a small part of a sound wave is lost to the air or other medium through various physical processes. One important process is the direct conduction ...
- acoustic bridge
- (from the article "ear, human") ...an actual measurement of the acoustic impedance of the ear, representing the state of the ossicular chain and the mobility of the tympanic membrane. This information can be obtained by means of the acoustic bridge-a device that enables the examiner ...
- acoustic communication system
- (from the article "sonar") ...the target (such as a ship, submarine, or torpedo). Waveforms thus detected may be analyzed for identifying characteristics as well as direction and distance. The third category of sonar devices is acoustic communication systems, which require a projector and receiver ...
- acoustic emission
- (from the article "ultrasonics") Structural flaws in materials can also be studied by subjecting the materials to stress and looking for acoustic emissions as the materials are stressed. Acoustic emission, the general name for this type of nondestructive study, has developed as a distinct ...
- acoustic gas meter
- (from the article "gas meter") Acoustic gas meters measure the rate of gas flow by comparing the frequency shifts of two initially identical signals (one sent upstream, the other downstream) after they are reflected.
- acoustic impedance
- absorption of sound in a medium, equal to the ratio of the sound pressure at a boundary surface to the sound flux (flow velocity of the particles or volume velocity, times area) through the surface. In analogy to electrical circuit ... [4 Related Articles]
- acoustic interferometer
- device for measuring the velocity and absorption of sound waves in a gas or liquid. A vibrating crystal creates the waves that are radiated continuously into the fluid medium, striking a movable reflector placed accurately parallel to the crystal source. ...
- acoustic microscope
- (from the article "microscope") In the early 1940s Soviet physicist Sergei Y. Sokolov proposed the use of ultrasound in a microscope and showed that sound waves with a frequency of 3,000 megahertz (MHz) would have a resolution equal to that of the optical microscope. ...
- acoustic mine
- (from the article "mine") ...circuit in the other chamber to explode the mine. The pressure mine reacts only to a pressure change produced by a ship larger than a minesweeper (q.v.), thus making it difficult to clear. Acoustic mines once depended on hydrophones to ...
- acoustic neuroma
- benign tumour on the vestibulocochlear nerve (also called acoustic nerve) near its point of entry into the inner ear. The tumour, though benign, may spread into the brain cavity if not detected in its first stages. Early symptoms include mild ... [1 Related Articles]
- acoustic ohm
- (from the article "sound") The unit of specific acoustic impedance is the pascal second per metre, often called the rayl, after Lord Rayleigh. The unit of acoustic impedance is the pascal second per cubic metre, called an acoustic ohm, by analogy to electrical impedance.types ...
- acoustic scansion
- (from the article "scansion") ...eighth notes for unstressed syllables, quarter or half notes for stressed syllables, and musical rests for pauses) record accentual differences. Machines such as the oscillograph are used by modern acoustic linguists to catch even slightly varying degrees of stress.
- acoustic sensillum
- (from the article "nervous system") ...thousands of axons. Another example is the ear of a noctuid moth. Each ear is essentially a tympanic membrane forming the outer wall of an air-filled cavity in the thorax. A five-tissue strand, the acoustic sensillum, runs from the centre ...
- acoustic suspension system
- (from the article "electromechanical transducer") ...horn, or other enclosure in order to separate the waves from the front and the rear of the loudspeaker and thereby prevent them from canceling each other. The most common type of enclosure is the acoustic suspension system, in which ...
- acoustic trauma
- physiological changes in the body caused by sound waves. Sound waves cause variations in pressure, the intensity of which depends upon the range of oscillation, the force exerting the sound, and the distribution of waves.
- acoustical engineering
- (from the article "theatre") Much recent study has centred on the problem of acoustics in the ancient theatre. The difficulty in achieving audibility to an audience of thousands, disposed around three-fifths to two-thirds of a full circular orchestra in the open air, seems to ...
- acoustical shadow
- (from the article "acoustics") Acoustic shadows, regions in which some frequency regions of sound are attenuated, can be caused by diffraction effects as the sound wave passes around large pillars and corners or underneath a low balcony. Large reflectors called clouds, suspended over the ...
- acoustico-lateralis system
- (from the article "mechanoreception") ...(the labyrinth) arise. The common embryologic origin and structural similarities of mature neuromasts and labyrinthine cell groups have led to the designation of all of these organs as the acoustico-lateralis system. The nerves to all the sense organs of the ...
- acoustics
- the science concerned with the production, control, transmission, reception, and effects of sound. The term is derived from the Greek akoustos, meaning "hearing." [11 Related Articles]
- acquiescence
- (from the article "personality assessment") Much study has been given to the ways in which response sets and test-taking attitudes influence behaviour on the MMPI and other personality measures. The response set called acquiescence, for example, refers to one's tendency to respond with "true" or ...
- acquired character
- in biology, modification in structure or function acquired by an organism during its life, caused by environmental factors. With respect to higher organisms, there is no evidence that such changes are transmissible genetically-the view associated with Lamarckism-but, among protozoans and ... [3 Related Articles]
- acquired contemplation
- (from the article "Christianity") ...whether mystical contemplation was the goal of all Christians or a special grace offered only to a few. The discrimination of the various forms of prayer and the distinction between acquired contemplation, for which the believer could strive with the ...
- acquired immunological tolerance
- (from the article "Burnet, Sir Macfarlane") Australian physician, immunologist, and virologist who, with Sir Peter Medawar, was awarded the 1960 Nobel Prize for Physiology or Medicine for the discovery of acquired immunological tolerance, the concept on which tissue transplantation is founded.work of Medawar
- acquired megacolon
- (from the article "megacolon") massive enlargement and dilation of the large intestine (colon). The two main types of the syndrome are congenital megacolon, or Hirschsprung disease, and acquired megacolon. In congenital megacolon, the lowermost portion of the large intestine is congenitally lacking in normal ...
- acquired ptosis
- (from the article "ptosis") Acquired ptosis has many potential causes, but it is usually due to age-related stretching or displacement of the fibres connecting the levator palpebrae superioris muscle to structures within the upper eyelid. It can also result from muscular diseases (such as ...
- acquired strabismus
- (from the article "strabismus") ...the causes undoubtedly have some genetic component. While congenital strabismus is more common in children with birth-related problems, most affected children are otherwise neurologically normal. Acquired strabismus appears later in life and has many potential etiologies. For example, acquired strabismus ...
- acquisition
- (from the article "memory") In the course of a typical day, humans receive a continuous stream of information from the world around them as well as from their own thought processes and physical experiences. They manage this constant stimulation through a combination of conscious ...
- acquittal
- in criminal law, acknowledgment by the court of the innocence of the defendant or defendants. Such a judgment may be made by a jury in a trial or by a judge who rules that there is insufficient evidence either for ...
- Acraeinae
- (from the article "lepidopteran") ...Morphinae are Neotropical, as are the highly distasteful, aposematic Heliconiinae and Ithomiinae that, with the worldwide Danainae, are models in many mimicry complexes; most of the pantropical Acraeinae are also highly protected and aposematic models; some nymphalids, such as the ...
- Acrasiales
- (from the article "Acrasieae") class name for cellular slime molds (division Myxomycophyta). The class contains a single order, Acrasiales, and about a dozen species. The vegetative phase of these slime molds consists of amoeba-like cells (myxamoebas) that group together ultimately to form a fruiting ...
- Acrasieae
- class name for cellular slime molds (division Myxomycophyta). The class contains a single order, Acrasiales, and about a dozen species. The vegetative phase of these slime molds consists of amoeba-like cells (myxamoebas) that group together ultimately to form a fruiting ... [1 Related Articles]
- Acre
- westernmost estado (state) of Brazil. Acre covers the southwesternmost part of Brazil's Hileia (Hylea), the forest zone of the Amazon River basin. Bounded north by Amazonas state, it has western and southern frontiers with Peru and southeastern ... [1 Related Articles]
- acre
- unit of land measurement in the British Imperial and United States Customary systems, equal to 43,560 square feet, or 160 square rods. One acre is equivalent to 0.4047 hectares (4,047 square metres). Derived from Middle English aker (from Old English ... [2 Related Articles]
- Acre River
- river, chiefly in western Brazil, rising on the Peruvian border, along which it continues eastward to form part of the Brazil-Bolivia border. Turning north at Brasileia, the remainder of its 400-mi (645-km) course flows in a north-northeasterly direction, through the ... [1 Related Articles]
- Acre, Plain of
- (from the article "Palestine") Coastal lowlands of varying widths front the Mediterranean. The most northerly is the Plain of 'Akko (Acre), which extends with a breadth of 5 to 9 miles (8 to 14 km) for about 20 miles (32 km) from the Lebanon ...
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