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isogamy
isogamy , in biology, a condition in which the sexual cells, or gametes, are of the same form and size and are usually indistinguishable from each other. Many algae and some fungi have isogamous gametes. In most sexual reproduction, as in mammals for example, the ovum is quite larger and of diff...
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anomie
anomie a social condition characterized by instability, the breakdown of social norms, institutional disorganization, and a divorce between socially valid goals and available means for achieving them. Introduced into sociology by Emile Durkheim in his study Suicide (1897), anomie also refers to...
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pleurisy
pleurisy , inflammation of the pleura (the membrane that covers the lungs and lines the chest cavity). It is sometimes accompanied by pain and coughing. The inflammation may be dry or it may be accompanied by an effusion, or fluid, that fills the chest cavity; when the effusion is infected, the cond...
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physical therapy
physical therapy or physiotherapy, treatment of disorders of the muscles, bones, or joints by means of physical agents—heat, light, water, manual and electronic massage, and exercise. Stroke, arthritis, fractures, and nerve damage are common conditions treated. The type of treatment neede...
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Black Belt
Black Belt term applied to several areas of Mississippi and Alabama, the heart of the Old South, which are characterized by black soil and excellent cotton-growing conditions. The Black Belt area was historically important as the nation's main cotton producer in the mid-1800s. Soil depletion, erosi...
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hardpan
hardpan condition of the soil or subsoil in which the soil grains become cemented together by such bonding agents as iron oxide and calcium carbonate, forming a hard, impervious mass. It is disadvantageous to farming, interfering with the circulation of moisture in the soil and with the growth of r...
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learning
learning in psychology, the process by which a relatively lasting change in potential behavior occurs as a result of practice or experience. Learning is distinguished from behavioral changes arising from such processes as maturation and illness, but does apply to motor skills, such as driving a car...
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amnesia
amnesia , [Gr.,=forgetfulness], condition characterized by loss of memory for long or short intervals of time. It may be caused by injury, shock, senility, severe illness, or mental disease. Some cases of amnesia involve the unconscious suppression of a painful experience and everything remindful ...
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blue baby
blue baby infant born with a congenital heart defect that causes a bluish coloration of the skin as a result of cyanosis (deoxygenated blood). The color is most noticeable around the lips and at the tips of the fingers and toes. The cyanotic condition occurs when a large portion of the venous blood...
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cretinism
cretinism , condition produced in infants and children due to lack of thyroid hormone. It usually results from a congenital defect (e.g., absence of the thyroid, presence of only a rudimentary gland, inability of the gland to produce thyroxine). However, it can develop later if there is a lack of io...
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