retinene
noun
ret·i·nene ˈre-tə-ˌnēn 
: retinal
Word History
First Known Use
1934, in the meaning defined above
Medical Definition
retinene
noun
ret·i·nene ˈret-ᵊn-ˌēn
: either of two aldehydes derived from vitamin A:
a
: retinal
b
: an orange-red crystalline compound C20H26O related to vitamin A2 and formed from porphyropsin by the action of light