oxy-

American Heritage® Dictionary of the English Language, Fourth Edition

1. Oxygen, especially additional oxygen: oxyacetylene.

Century Dictionary and Cyclopedia

1. Of or pertaining to an ox; resembling an ox; bovine.
2. Wet; soft; spongy: applied to land.
3. n. In chem., a prefix indicating that the substance named contains oxygen. In almost all cases it is chemically synonymous with hydroxy-, which is to be preferred.

Wiktionary

1. Concerning oxygen
2. Sharp, keen, acute, pungent, acid

GNU Webster's 1913

1. A compound containing oxygen.
2. A compound containing the hydroxyl group, more properly designated by hydroxy-. See hydroxy-.