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optogram

n. the physical image produced on the retina by the bleaching of rhodopsin by a visual stimulus (see pigment bleaching). In the 19th century, optograms were obtained by rapidly removing the retina of experimental animals after they had viewed a bright stationary stimulus and, in several instances, by examining the retinas of human prisoners immediately after execution.

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Psychology term of the day

November 23rd 2024

sibling

sibling

n. one of two or more children born of the same two parents (i.e., a sister or brother). Also called sib.