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Down syndrome

(Encyclopedia)Down syndrome, congenital disorder characterized by mild to severe mental retardation, slow physical development, and characteristic physical features. Down syndrome affects about 1 in every 730 live ...

dwarfism

(Encyclopedia)dwarfism, condition in which an animal or plant is less than normal in size and lacks the capacity for normal growth. Dwarfism is deliberately produced and perpetuated in certain species (e.g., in bre...

fetal alcohol syndrome

(Encyclopedia)fetal alcohol syndrome (FAS), pattern of physical, developmental, and psychological abnormalities seen in babies born to mothers who consumed alcohol during pregnancy. The abnormalities include low bi...

Bain, Alexander

(Encyclopedia)Bain, Alexander, 1818–1903, Scottish philosopher and psychologist. He was educated at Marischal College, Aberdeen, where he later taught for three years. He taught one year (1845) at Anderson's Univ...

cytomegalovirus

(Encyclopedia)cytomegalovirus sīˌtəmĕgˌəlōvīˈrəs [key], member of the herpesvirus family that can cause serious complications in persons with weakened immune systems and infants. A common virus, it is est...

rubella

(Encyclopedia)rubella or German measles, acute infectious disease of children and young adults. It is caused by a filterable virus that is spread by droplet spray from the respiratory tract of an infected individua...

learning disabilities

(Encyclopedia)learning disabilities, in education, any of various disorders involved in understanding or using spoken or written language, including difficulties in listening, thinking, talking, reading, writing, s...

Tay-Sachs disease

(Encyclopedia)Tay-Sachs disease tāˈ-săksˈ [key], rare hereditary disease caused by a genetic mutation that leaves the body unable to produce an enzyme necessary for fat metabolism in nerve cells, producing cent...

harvest moon

(Encyclopedia)harvest moon, full moon occurring nearest to the autumnal equinox, about Sept. 23. During harvest moon the retardation (later rising each night) of the moon is at a minimum because of the relation of ...

cerebral palsy

(Encyclopedia)cerebral palsy sərēˈbrəl pôlˈzē [key], disability caused by brain damage before or during birth or in the first years, resulting in a loss of voluntary muscular control and coordination. Althou...