…of the fleece, rolls it up, and carries it into the background as three-and-a-half pounds of unadulterated warmth for the winter enjoyment of persons unknown and far away, who will, however, never experience the superlative comfort derivable from the wool as it here exists, new and pure—before the unctuousness of its nature whilst in a living state has dried, stiffened, and been washed out—rendering it just now as superior to anything WOOLLEN as cream is superior to milk-and-water.
There are no more uses of "unctuous" in the book.
Show samples from other sources
But she kept her attention on me, unctuously gesturing, and even as he leaned and bucked into her she held out her open hand to me, as if I should take it when I crept my way inside.
Chang-rae Lee -- A Gesture Life
He made no effort to be civil, or his normal unctuous, ingratiating self.