Main Entry: unc·tu·ous

Pronunciation: \ˈəŋ(k)-chə-wəs, -chəs, -shwəs\

Function: adjective

Etymology: Middle English, from Middle French or Medieval Latin; Middle French unctueus, from Medieval Latin unctuosus, from Latin unctus act of anointing, from unguere to anoint

Date: 14th century

1 a : fatty, oily b : smooth and greasy in texture or appearance
2 : plastic <fine unctuous clay>
3 : full of unction; especially : revealing or marked by a smug, ingratiating, and false earnestness or spirituality

— unc·tu·ous·ly adverb

— unc·tu·ous·ness noun