Words in english starting with O

• ovulation — Noun – English ～ the expulsion of an ovum from the ovary (usually midway in the menstrual cycle)
• ovulation method — Noun – English ～ natural family planning in which the fertile period is inferred from changes in the character and quantity of cervical mucus; ovulation is marked by an increase in mucus that becomes sticky and then clearer and slippery
• orthotropous ovule — Noun – English ～ a completely straight ovule with the micropyle at the apex
• ovule — Noun – English ～ a small body that contains the female germ cell of a plant; develops into a seed after fertilization
• ovule — Noun – English ～ a small or immature ovum
• Ovulen — Noun – English ～ trade name for an oral contraceptive containing mestranol and a progestin compound
• ovum — Noun – English ～ the female reproductive cell; the female gamete
• owe — Verb – English ～ be in debt; "She owes me $200"; "I still owe for the car"; "The thesis owes much to his adviser"
• owe — Verb – English ～ be indebted to, in an abstract or intellectual sense; "This new theory owes much to Einstein's Relativity Theory"
• owe — Verb – English ～ be obliged to pay or repay
• Owen Glendower — Noun – English ～ Welsh chieftain who led a revolt against Henry IV's rule in Wales (1359-1416)
• Owen — Noun – English ～ Welsh industrialist and social reformer who founded cooperative communities (1771-1858)
• Owen — Noun – English ～ English comparative anatomist and paleontologist who was an opponent of Darwinism (1804-1892)
• Owens — Noun – English ～ United States athlete and Black American whose success in the 1936 Olympic Games in Berlin outraged Hitler (1913-1980)
• owensboro — Noun – English ～ a town in northwestern Kentucky on the Ohio River; a tobacco market
• owing — Adjective – English ～ owed as a debt; "outstanding bills"; "the amount still owed"; "undischarged debts"
• owl — Noun – English ～ nocturnal bird of prey with hawk-like beak and claws and large head with front-facing eyes
• owlclaws — Noun – English ～ stout perennial herb of western United States having flower heads with drooping orange-yellow rays; causes spewing sickness in sheep
• owlet — Noun – English ～ young owl
• owlet moth — Noun – English ～ usually dull-colored medium-sized nocturnal moth; the usually smooth-bodied larvae are destructive agricultural pests

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