from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. See rhodopsin.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The pigment rhodopsin.

from the GNU version of the Collaborative International Dictionary of English

  • adj. a photochemical substance, of a purplish red color, contained in the retina of human eyes and in the eyes of most animals. It is quickly bleached by light, passing through the colors, red, orange, and yellow, and then disappearing. Also called rhodopsin, and vision purple. See Optography.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a red photopigment in the retinal rods of vertebrates; dissociates into retinene by light


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