- am|mo|ni|ac «uh MOH nee ak», noun, adjective.–n.1. a gum resin used for medicines and as a cement for porcelain; gum ammoniac.–adj.= ammoniacal. (Cf. ↑ammoniacal)╂[< Latin Ammōniacum < Greek ammōniakós of Ammon (the gum was said to come from near the shrine of Ammon in Libya)]
Useful english dictionary. 2012.