adjective unc·tu·ous \ˈəŋ(k)-chə-wəs, -chəs, -shwəs\

—used to describe someone who speaks and behaves in a way that is meant to seem friendly and polite but that is unpleasant because it is obviously not sincere

Full Definition of UNCTUOUS

a :  fatty, oily
b :  smooth and greasy in texture or appearance
:  plastic <fine unctuous clay>
:  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

Origin of UNCTUOUS

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
First Known Use: 14th century

Other Ecology Terms

Malthusian, anthropogenic, biomass, carbon footprint, crepuscular, niche, sere, symbiosis, taiga, tundra
Medical Dictionary


adjective unc·tu·ous \ˈəŋ(k)-chə(-wə)s, ˈəŋ(k)sh-wəs\

Medical Definition of UNCTUOUS

:  rich in oil or fat :  fatty <an unctuous pharmaceutical preparation>


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