transcription, транскрипция: [ preg-ˈne-nə-ˌlōn ]
noun
Etymology: International Scientific Vocabulary pregnene (C 21 H 34 ) + -ol (I) + -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