adj. 1 (of behaviour, speech, etc.) unpleasantly flattering; oily. 2 (esp. of minerals) having a greasy or soapy feel; oily. unctuously adv. unctuousness n.
[ ME f. med.L unctuosus f. L unctus anointing (as UNCTION) ]
UNCTUOUS
Meaning of UNCTUOUS in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012