OH
English
Proper noun
OH
- (US) Abbreviation of Ohio.
Noun
OH (plural OHs)
- (Internet slang) Initialism of other half: a husband, wife, partner, etc.
- (US, army, aviation) Initialism of observation helicopter.
Noun
- Initialism of office hours.
Symbol
OH
- (organic chemistry) A hydroxyl, or alcohol, functional group.
- (inorganic chemistry) A hydroxide radical, or hydroxyl group.