The Collaborative International Dictionary of English v.0.48:

Ajouan \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.
   [Webster 1913 Suppl.]