1. Having several forms of gametoecia on the same plant
   - heteroicous, polygamous

See also: monecious, monoecious, monoicous

• unopened
• unopposable
• unopposed
• unordered
• unorganised
• unorganized
• unoriented
• unoriginal
• unoriginality
• unoriginally
• unoriginated
• unornamented
• unorthodox
• unorthodoxy
• unostentatious
• unowned
• unoxygenated
• unpack
• unpackaged
• unpaid
• unpaid worker
• unpainful
• unpaintable
• unpainted
• unpaired