1. Orchid of South and Central America having flowers similar to but smaller than Psychopsis papilio; sometimes placed in genus Oncidium
   - Psychopsis krameriana

Type of: butterfly orchid

• Oscillatoriaceae
• oscillatory
• oscillogram
• oscillograph
• oscilloscope
• oscine
• oscine bird
• Oscines
• oscitance
• oscitancy
• oscitant
• oscitation
• Osco-Umbrian
• oscular
• osculate
• osculating circle
• osculation
• osculator
• osculatory
• oscule
• osculum
• OSHA
• osier
• Osip Emilevich Mandelstam
• Osip Mandelstam