Category: A
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Achromatic vision
Color blindness.
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Achromatic
Colorless visual sensations, rods; cones; retina.
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Achondroplastic dwarfism
A peculiar type of dwarfism caused by defective development of the ends of the long bones during fetal development.
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Achondroplasia
A condition occurring in fetal life in which cartilage is absorbed during the development of bone tissue resulting in a disproportionate growth of the trunk and extremities producing achondroplastic dwarfism. An inherited condition in which the long bones in the arms and legs do not grow fully while the rest of the bones in the…
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Achlorhydris
A lack of hydrochloric acid in the stomach.
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Achilles tendon
The large tendon at the back of the heel which moves the foot up and down at the ankle joint. Tendon at the back of the ankle which connects the calf muscles to the heel and which acts to pull up the heel when the calf muscle is contracted. Large tendon that connects the calf…
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Achievement test
A device (written, oral, or manipulative) that measures the degree of proficiency already attained in some specific skill or ability (intellectual, social, emotional, or manual). A type of educational test that measures how much knowledge or what level of skills a student has gained, often after specific instruction, as opposed to an aptitude test or…
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Achievement motive
The desire to meet or exceed some standard of excellence.
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Achievement motivation
Behavior that results from the need for achievement, the desire to do something better or more efficiently than it had been done before, achievement motive.
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Achievement age
The age of a person associated with the level of acquired learning determined by a proficiency test and related to the chronological age of the average with the level of achievement. The age of a person with regard to level of acquired learning; determined by a proficiency test and expressed in terms of the chronological…