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ar·o·mat·ic / ˌarəˈmatik/ • adj. 1. having a pleasant and distinctive smell: a massage with aromatic oils.2. Chem. (of an organic compound) containing a planar unsaturated ring of atoms that is stabilized by an interaction of the bonds forming the ring. Compare with alicyclic.• n. 1. a substance or plant emitting a pleasant and distinctive smell.2. (usu. aromatics) Chem. an aromatic compound.DERIVATIVES: ar·o·mat·i·cal·ly·o·ma·tic·i·ty / -məˈtisitē/ n. ( Chem. ).