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jaundice

n. a condition associated with a variety of disorders of the liver, gallbladder, and blood and marked by the deposition of bile pigments in the skin, eye surfaces, and excrement. The pigment, which is usually first observed in discoloration of the normally white areas of the eyes, is produced as bilirubin, a breakdown product of the hemoglobin of red blood cells. Jaundice is associated with liver infections but may also occur as an adverse reaction to certain drugs. It is also a causative factor in neurological birth defects (see kernicterus). Also called icterus.

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Psychology term of the day

March 13th 2025

class inclusion

class inclusion

the concept that a subordinate class (e.g., dogs) must always be smaller than the superordinate class in which it is contained (e.g., animals). Jean Piaget believed that understanding the concept of class inclusion represented an important developmental step. Children progress from classifications based on personal factors, perceptual features, and common function to classifications based on hierarchical relationships; for example, a monkey is a primate, a mammal, and a vertebrate animal. See concrete operation.