Lewis & Short

ămārăcĭnus, a, um, adj. [amaracus], of marjoram: oleum, Plin. 21, 22, 93, § 163: unguentum, id. 13, 1, 2, § 3; also absol.: ămārăcĭnum, i, n. (sc. unguentum), marjoram ointment, Lucr. 2, 847; 4, 1173; odious to swine, id. 6, 974; hence the proverb: nihil cum amaracino sui, of people who will have nothing to do with a thing, Gell. praef. 19.