Words in english starting with O

• order of payment — Noun – English ～ a document ordering the payment of money; drawn by one person or bank on another
• order Pectinibranchia — Noun – English ～ large order of gastropods comprising univalve mollusks that have a single gill resembling a comb
• order Pediculati — Noun – English ～ anglers and batfishes; spiny-finned marine fishes having pectoral fins at the ends of armlike processes and a long movable spine on the dorsal fin to lure prey to the large mouth
• order Pedipalpi — Noun – English ～ whip scorpions
• orange peel — Noun – English ～ strips of orange peel cooked in sugar and coated with sugar
• orange peel — Noun – English ～ the rind of an orange
• orange peel fungus — Noun – English ～ a discomycete with bright orange cup-shaped or saucer-shaped fruiting bodies and pale orange exteriors
• orange pekoe — Noun – English ～ a superior grade of black tea; grown in India and Sri Lanka and Java
• order Pelecaniformes — Noun – English ～ pelicans; frigate birds; gannets; cormorants
• order Pelycosauria — Noun – English ～ edaphosaurus; dimetrodon
• Ophioglossum pendulum — Noun – English ～ epiphytic fern with straplike usually twisted fronds of tropical Asia and Polynesia and America
• old-age pension — Noun – English ～ a monthly payment made to someone who is retired from work
• old-age pensioner — Noun – English ～ an old person who receives an old-age pension
• one percent — Noun – English ～ one part in a hundred equal parts
• olfactory perception — Noun – English ～ 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 — Noun – English ～ North Atlantic rockfish
• ocean perch — Noun – English ～ large fish of northern Atlantic coasts of America and Europe
• order Perciformes — Noun – English ～ one of the largest natural groups of fishes of both marine and fresh water: true perches; basses; tuna
• order Percomorphi — Noun – English ～ one of the largest natural groups of fishes of both marine and fresh water: true perches; basses; tuna
• Ordovician period — Noun – English ～ from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds

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