\Aj"ou*an\ Ajowan \Aj"ow*an\, n. [Written also {ajwain}.] [Prob. native name.] (Bot.) The fruit of {Ammi Copticum}, syn. {Carum Ajowan}, used both as a medicine and as a condiment. An oil containing thymol is extracted from it. Called also {Javanee seed}, {Javanese seed}, and {ajava}.