combining form
Etymology: International Scientific Vocabulary, from Latin aqua water + International Scientific Vocabulary -o-
1. : containing a molecule of water as part of a coordination complex
hex aquo cobalt (III) chloride [Co (H 2 O) 6 ]Cl 3
2. : derived from water — in names of chemical compounds
aquo carbonic acid OC(OH) 2
— compare ammono- 2