Ophioglossum pendulum
— Navneord
– Engelsk
～ epiphytic fern with straplike usually twisted fronds of tropical Asia and Polynesia and America
old-age pension
— Navneord
– Engelsk
～ a monthly payment made to someone who is retired from work
old-age pensioner
— Navneord
– Engelsk
～ an old person who receives an old-age pension
one percent
— Navneord
– Engelsk
～ one part in a hundred equal parts
olfactory perception
— Navneord
– Engelsk
～ the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form; "she loved the smell of roses"
ocean perch
— Navneord
– Engelsk
～ North Atlantic rockfish
ocean perch
— Navneord
– Engelsk
～ large fish of northern Atlantic coasts of America and Europe
order Perciformes
— Navneord
– Engelsk
～ one of the largest natural groups of fishes of both marine and fresh water: true perches; basses; tuna
order Percomorphi
— Navneord
– Engelsk
～ one of the largest natural groups of fishes of both marine and fresh water: true perches; basses; tuna
Ordovician period
— Navneord
– Engelsk
～ from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds
orbit period
— Navneord
– Engelsk
～ the time it takes to complete one full orbit around a celestial body; "the orbit period depends on the altitude of the satellite"
overtime period
— Navneord
– Engelsk
～ a period of overtime play to resolve a tie; e.g. basketball
order Perissodactyla
— Navneord
– Engelsk
～ nonruminant ungulates: horses; tapirs; rhinoceros; extinct forms
order Peronosporales
— Navneord
– Engelsk
～ order of chiefly parasitic lower fungi: Albuginaceae and Peronosporaceae and Pythiaceae
Oliver Hazard Perry
— Navneord
– Engelsk
～ United States commodore who led the fleet that defeated the British on Lake Erie during the War of 1812; brother of Matthew Calbraith Perry (1785-1819)
old person
— Navneord
– Engelsk
～ an elderly person
one-person
— Tillægsord
– Engelsk
～ designed for or restricted to a single person; "a one-man show"; "a one-person tent"; "Sarah Silverman's hilarious one-woman show"