verb

n. a word or phrase used to describe an action, occurrence, or state, forming the essential part of the predicate of a sentence. The verb is also identifiable as the element of the sentence that marks temporality (tense), mood, voice (see active voice; passive voice), and number agreement with the subject. See also actional verb; auxiliary verb; causative verb.

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Psychology term of the day

January 19th 2025

short-wavelength pigment

short-wavelength pigment

the photopigment present in one of the three populations of retinal cones that has maximum sensitivity to a wavelength of 419 nm. The absence of the gene for the short-wavelength pigment causes tritanopia, a form of color blindness in which blue and green are confused with one another. See also long-wavelength pigment; medium-wavelength pigment.