n.
Pronunciation: preg- ' ne-n ə - ˌ l ō n
Function: noun
Etymology: International Scientific Vocabulary pregnene (C 21 H 34 ) + 1 -ol + -one
Date: 1936
: an unsaturated hydroxy steroid ketone C 21 H 32 O 2 that is formed by the oxidation of steroids (as cholesterol) and yields progesterone on dehydrogenation