(n) a large family of aromatic herbs and shrubs having flowers resembling the lips of a mouth and four-lobed ovaries yielding four one-seeded nutlets and including mint; thyme; sage; rosemary, Syn. Lamiaceae, family Labiatae, family Lamiaceae, mint family
a. [ NL. labiatus, fr. L. labium lip. ] (Bot.) (a) Having the limb of a tubular corolla or calyx divided into two unequal parts, one projecting over the other like the lips of a mouth, as in the snapdragon, sage, and catnip. (b) Belonging to a natural order of plants (Labiatæ), of which the mint, sage, and catnip are examples. They are mostly aromatic herbs. [ 1913 Webster ]