officinal Look up officinal at Dictionary.com
"kept in stock by a druggist," c.1720, from Fr. officinal, from M.L. officinalis, lit. "of or belonging in an officina," a storeroom (of a monastery) for medicines and necessaries, from L. officina "workshop," contraction of *opificina, from opifex (gen. opificis) "worker, maker, doer" (from opus "work") + -fex, -ficis "one who does," from facere "do, perform" (see factitious).