Glacial acid

(Chem.) an acid of such strength or purity as to crystallize at an ordinary temperature, in an icelike form; as acetic or carbolic acid.

See also: Glacial

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The supernatant was removed by centrifugation and subsequently 5 ml of chilled fixative (methanol: glacial acid; 3:1) was added.
To this we added 30 mL of glacial acid and 30 mL of distilled water.