Orbignya phalerata
— Noun
– English
～ tall feather palm of northern Brazil with hard-shelled nuts yielding valuable oil and a kind of vegetable ivory
order Phallales
— Noun
– English
～ order of fungi comprising the stinkhorns and related forms whose mature hymenium is slimy and fetid; sometimes placed in subclass Homobasidiomycetes
oral phase
— Noun
– English
～ (psychoanalysis) the first sexual and social stage of an infant's development; the mouth is the focus of the libido and satisfaction comes from suckling and chewing and biting
order Phasmatodea
— Noun
– English
～ in some classifications considered a suborder of Orthoptera: stick insects; leaf insects
order Phasmida
— Noun
– English
～ in some classifications considered a suborder of Orthoptera: stick insects; leaf insects
organic phenomenon
— Noun
– English
～ (biology) a natural phenomenon involving living plants and animals
optical phenomenon
— Noun
– English
～ a physical phenomenon related to or involving light
order Pholidota
— Noun
– English
～ pangolins; in some former classifications included in the order Edentata
orinasal phone
— Noun
– English
～ a speech sound produced with both the oral and nasal passages open (as French nasal vowels)
oxidative phosphorylation
— Noun
– English
～ an enzymatic process in cell metabolism that synthesizes ATP from ADP
order Picariae
— Noun
– English
～ term used in some classifications as nearly equivalent to the order Coraciiformes
order Piciformes
— Noun
– English
～ woodpeckers; jacamars; puffbirds; barbets; honey guides; toucans
Oreortyx picta palmeri
— Noun
– English
～ California partridge; slightly larger than the California quail
Oxylebius pictus
— Noun
– English
～ greenling with whitish body marked with black bands
one-piece
— Adjective
– English
～ (of clothing) consisting of or fashioned in a single whole piece; "a one-piece garment"
oral contraceptive pill
— Noun
– English
～ a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception