aq.

aqua; aq.; a., (s); aquae, (pl) A reference to an aqueduct that was used to supply water to the city of Rome. During the Republic, aqueducts, and the water supplied, were cared for by water companies hired under contract by the censors. This abbreviation (aq.) is used with several adjectives that have applications for medical or pharmaceutical i......
Found on http://www.wordinfo.info/words/index/info/view_unit/170/

aq.

Type: Abbreviation Definitions: 1. Abbreviation for L. aqua, water.
Found on http://www.medilexicon.com/medicaldictionary.php?t=5821

aq.

Water (from Latin aqua)
Found on http://www.translationdirectory.com/glossaries/glossary124.htm
No exact match found