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n. a constitutional type (somatotype) in Sheldon’s constitutional theory of personality characterized by a thin, long, fragile physique, which—according to this theory—is highly correlated with cerebrotonia. Also called ectomorphic body type. —ectomorphic adj. —ectomorphy n.

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Psychology term of the day

February 26th 2024



n. red–green color blindness in which the deficiency is due to absence of the cone photopigment sensitive to green light, resulting in loss of green sensitivity and confusion between red and green (see dichromatism). The condition may be unilateral (i.e., color vision may be normal in one eye). See also protanopia.