| os | medium-sized hop hornbeam of eastern North America |
|---|---|
| os | deciduous monoecious shrubs of China and Mongolia resembling trees of the genus Ostrya |
| os | German chemist (1853-1932) |
| os | (chemistry) the theory that all indicators are either weak acids or weak bases in which the color of the ionized form is different from the color before dissociation |
| os | a Ugric language (related to Hungarian) spoken by the Ostyak people |
| os | a member of the nomadic Ugrian people living in northwestern Siberia (east of the Ural mountains) |
| os | the Uralic language spoken by the Ostyak-Samoyed people |
| os | one of the people of mixed Ostyak and Samoyed origin in Siberia |
| os | United States assassin of President John F. Kennedy (1939-1963) |
| os | German philosopher who argued that cultures grow and decay in cycles (1880-1936) |
| os | United States mathematician (1880-1960) |
| os | perennial aromatic herb of eastern North America having variously colored tubular flowers in dense showy heads |