(ə·mō′nē·ak) adjective
Of, containing, or resembling ammonia. Also am·mo·ni·a·cal (am′ə·nī′ə·kəl).

(ə·mō′nē·ak) noun
A gum resin obtained from an umbelliferous plant (Dorema acconiacum) of Asia. Also called gum ammoniac. [<F <L ammoniacum <Gk. ammōniakon, a resinous gum said to come from a plant growing near the temple Of Ammon in Libya]