iodopsin

American

[ahy-uh-dop-sin] / ˌaɪ əˈdɒp sɪn /

noun

Biochemistry.

a photosensitive violet pigment that occurs in the cones of the retina and is transformed by light into retinal and an opsin protein.

iodopsin British

/ ˌaɪəˈdɒpsɪn /

noun

Also called: visual violet. a violet light-sensitive pigment in the cones of the retina of the eye that is responsible for colour vision See also rhodopsin

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of iodopsin

1935–40; < Greek īṓd ( ēs ) taken as derivative of íon violet ( see iodine) + opsin, on the pattern of rhodopsin

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023