n.
Pronunciation: ' re-t ə - ˌ no ̇ l, - ˌ n ō l
Function: noun
Etymology: retin- + 1 -ol; from its being the source of retinal
Date: 1960
: the chief and typical vitamin A C 20 H 29 OH that is a highly unsaturated alicyclic alcohol used in various forms in medicine and nutrition