Nouns in english starting with O

• oscitancy — Noun – English ～ drowsiness and dullness manifested by yawning
• oscitancy — Noun – English ～ an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom; "he could not suppress a yawn"; "the yawning in the audience told him it was time to stop"; "he apologized for his oscitancy"
• osculating circle — Noun – English ～ the circle that touches a curve (on the concave side) and whose radius is the radius of curvature
• osculation — Noun – English ～ (mathematics) a contact of two curves (or two surfaces) at which they have a common tangent
• osculation — Noun – English ～ the act of caressing with the lips (or an instance thereof)
• osculator — Noun – English ～ someone who kisses
• osha — Noun – English ～ a government agency in the Department of Labor to maintain a safe and healthy work environment
• osier — Noun – English ～ any of various willows having pliable twigs used in basketry and furniture
• osier — Noun – English ～ flexible twig of a willow tree
• Osip Emilevich Mandelstam — Noun – English ～ Russian poet who died in a prison camp (1891-1938)
• Osip Mandelstam — Noun – English ～ Russian poet who died in a prison camp (1891-1938)
• osiris — Noun – English ～ Egyptian god of the underworld and judge of the dead; husband and brother of Isis; father of Horus
• Oslo — Noun – English ～ the capital and largest city of Norway; the country's main port; located at the head of a fjord on Norway's southern coast
• Osman I — Noun – English ～ the conqueror of Turkey who founded the Ottoman Empire and the Ottoman dynasty that ruled Turkey after the 13th century; conquered most of Asia Minor and assumed the title of emir in 1299 (1259-1326)
• osmanli — Noun – English ～ a Turk (especially a Turk who is a member of the tribe of Osman I)
• Osmanthus americanus — Noun – English ～ small tree of southern United States having panicles of dull white flowers followed by dark purple fruits
• osmanthus — Noun – English ～ widely distributed genus of evergreen shrubs or trees of southern United States and Middle East and China and Japan
• Osmeridae — Noun – English ～ smelts
• Osmerus eperlanus — Noun – English ～ the common smelt of Europe
• Osmerus mordax — Noun – English ～ important marine and landlocked food fish of eastern North America and Alaska

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