AMMONIACAL Meaning of AMMONIACAL in English adj. of, relating to, or containing ammonia or sal ammoniac. [ ME ammoniac f. OF (arm-, amm-) f. L f. Gk ammoniakos of Ammon (cf. SAL AMMONIAC) + -AL ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012