Nouns in english starting with O

• oleic acid — Noun – English ～ a colorless oily liquid occurring as a glyceride; it is the major fatty acid in olive oil and canola oil; used in making soap and cosmetics and ointments and lubricating oils
• olein — Noun – English ～ a naturally occurring glyceride of oleic acid that is found in fats and oils
• oleo — Noun – English ～ a spread made chiefly from vegetable oils and used as a substitute for butter
• oleo oil — Noun – English ～ obtained from beef fat; used in making margarine and soap and in lubrication
• oleomargarine — Noun – English ～ a spread made chiefly from vegetable oils and used as a substitute for butter
• oleoresin capiscum — Noun – English ～ an oleoresin extracted from the capsicum pepper plant
• oleoresin — Noun – English ～ a naturally occurring mixture of a resin and an essential oil; obtained from certain plants
• olfaction — Noun – English ～ the faculty that enables us to distinguish scents
• olfactory brain — Noun – English ～ a center in the cerebral hemispheres that governs the sense of smell in lower animals; in humans it seems to mediate complex emotional behavior
• olfactory impairment — Noun – English ～ a disorder in the sense of smell
• olfactory modality — Noun – English ～ the faculty that enables us to distinguish scents
• olfactory bulb — Noun – English ～ one of two enlargements at the terminus of the olfactory nerve at the base of the brain just above the nasal cavities
• olfactory nerve — Noun – English ～ a collective term for numerous olfactory filaments in the nasal mucosa
• Olfersia — Noun – English ～ genus of fern having only one species
• Olfersia cervina — Noun – English ～ tropical American terrestrial fern with leathery lanceolate fronds; sometimes placed in genus Polybotrya
• Olga Korbut — Noun – English ～ Soviet gymnast (born in 1955)
• olibanum — Noun – English ～ an aromatic gum resin obtained from various Arabian or East African trees; formerly valued for worship and for embalming and fumigation
• oligarch — Noun – English ～ one of the rulers in an oligarchy
• oligarchy — Noun – English ～ a political system governed by a few people; "one of his cardinal convictions was that Britain was not run as a democracy but as an oligarchy"; "the big cities were notoriously in the hands of the oligarchy of local businessmen"
• oligo — Noun – English ～ (biochemistry) a polynucleotide whose molecules contain relatively few nucleotides

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