os palatinum
— Noun
– English
～ either of two irregularly shaped bones that form the back of the hard palate and helps to form the nasal cavity and the floor of the orbits
oil palm
— Noun
– English
～ pinnate-leaved palms of the genus Elaeis having dense clusters of crowded flowers and bright red fruit and yielding high quality palm oils
order Palmales
— Noun
– English
～ coextensive with the family Palmae: palms
Oryzomys palustris
— Noun
– English
～ hardy agile rat of grassy marshes of Mexico and the southeastern United States
omelet pan
— Noun
– English
～ pan for cooking omelets
omelette pan
— Noun
– English
～ pan for cooking omelets
order Pandanales
— Noun
– English
～ families Typhaceae; Sparganiaceae; Pandanaceae
order Papaverales
— Noun
– English
～ an order of dicotyledonous plants
order paper
— Noun
– English
～ a printed copy of the order of the day
on paper
— Adverb
– English
～ as written or printed; "this is exactly what the composer had set down on paper"
Oncidium papilio kramerianum
— Noun
– English
～ orchid of South and Central America having flowers similar to but smaller than Psychopsis papilio; sometimes placed in genus Oncidium
Oncidium papilio
— Noun
– English
～ orchid of South America and Trinidad having large yellow and reddish-brown flowers; sometimes placed in genus Oncidium
Orchis papilionaceae
— Noun
– English
～ Mediterranean orchid having usually purple flowers with a fan-shaped spotted or striped rose-red lip