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[L. oleum, oil, + E. margarin.] A granular solid fat of a slightly yellowish color, obtained from the leaf-fat or caul-fat of cattle: so named by the inventor of the proce of its preparation. The fat is first carefully cleaned from adhering impurities, as bits of flesh, etc., and then thor S. Butler, Hudibras, I. i. 742. The sense of smell or faculty of smelling; an olfactory act or proce ; smell; scent. He thought a single momentary olfaction at a phial containing a globule the size of a mustard seed, moistened Nature, XXXVII, 289. with the decillionth potency of aconite, is quite sufficient. olfactive