n. Water: a word much used in medical prescriptions written in Latin, and in pharmacy generally, also in old chemistry, to denote a solution, or menstruum of water.n. In anatomy, some watery fluid or humor.n. A carminative cordial prepared from oil of pimento (allspice): also called spiritus pimentœ. Dunglison.n. In pharmacy, a solution of an essential oil or gas in water, a solution of any other substance being termed liquor. In the British pharmacopœia, only a solution of an essential oil is called aqua, that of a gas being called liquor.