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extensor

n. a muscle whose contraction extends a part of the body; for example, the triceps muscle group extends, or straightens, the arm. Compare flexor.

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Psychology term of the day

February 26th 2024

deuteranopia

deuteranopia

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.