retinene

retinal

2 [ret-n-al, -awl]
noun Biochemistry.
an orange pigment, C 2 0 H 2 8 O, that is the active component of rhodopsin and is liberated upon the absorption of light in the vision cycle; vitamin A aldehyde.
Also, retinene [ret-n-een] .


Origin:
1940–45; retin(a) + -al3

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World English Dictionary
retinene or retinal (ˈrɛtɪˌniːn, ˈrɛtɪnəl)
 
n
the aldehyde form of the polyene retinol (vitamin A) that associates with the protein opsin to form the visual purple pigment rhodopsin
 
[C20: from retina + -ene]
 
retinal or retinal
 
n
 
[C20: from retina + -ene]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

retinal ret·i·nal (rět'n-āl', -ôl')
n.
See retinaldehyde.

retinene ret·i·nene (rět'n-ēn')
n.
Either of two yellow to red retinal pigments, formed by oxidation of vitamin A alcohols.

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