adj.
Pronunciation: ə - ' fi-s ə -n ə l, o ̇ -, ä-; ˌ o ̇ -f ə - ' s ī -n ə l, ˌ ä-
Function: adjective
Etymology: Medieval Latin officinalis of a storeroom, from officina storeroom, from Latin, workshop, from opific-, opifex workman, from opus work + facere to do
Date: circa 1720
: MEDICINAL <a monograph on officinal flora>