Nouns starting with O that are validated

• Oleandraceae — Noun – English ～ one of a number of families into which Polypodiaceae has been subdivided in some classification systems
• Olearia argophylla — Noun – English ～ musk-scented shrub or tree of southern and southeastern Australia having creamy-yellow flower heads
• Olearia haastii — Noun – English ～ bushy New Zealand shrub cultivated for its fragrant white flower heads
• Olearia — Noun – English ～ large genus of Australian evergreen shrubs or small trees with large daisylike flowers
• oleaster family — Noun – English ～ shrubs or small trees often armed
• oleaster — Noun – English ～ any of several shrubs of the genus Elaeagnus having silver-white twigs and yellow flowers followed by olivelike fruits
• olecranon — Noun – English ～ process of the ulna that forms the outer bump of the elbow and fits into the fossa of the humerus when the arm is extended
• oled — Noun – English ～ a self-luminous diode (it glows when an electrical field is applied to the electrodes) that does not require backlighting or diffusers
• olefin — Noun – English ～ any unsaturated aliphatic hydrocarbon
• olefine — Noun – English ～ any unsaturated aliphatic hydrocarbon
• 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

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