visual purple

visual purple defined in 1951 year

visual purple - visual purple;
visual purple - Compound of a protein with a prosthetic group of which Vitamin A is an essential precursor. Occurs in rods of vertebrate retina. Chemically changed (and bleached) by light, the change being basis of function of rods as light-sensitive receptors. Increases in amount in dark, raising sensitivity of rods to faint light (dark adaptation).

near visual purple in Knolik

letter "V"
start from "VI"
vital staining

definition of word "visual purple" was readed 1048 times

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