Nouns in english starting with O

• omega — Noun – English ～ the last (24th) letter of the Greek alphabet
• omega-6 — Noun – English ～ a polyunsaturated fatty acid whose carbon chain has its first double valence bond six carbons from the beginning
• Omega Centauri — Noun – English ～ a global cluster in the constellation Centaurus
• omega-3 fatty acid — Noun – English ～ a polyunsaturated fatty acid whose carbon chain has its first double valence bond three carbons from the beginning
• omega — Noun – English ～ the ending of a series or sequence; "the Alpha and the Omega, the first and the last, the beginning and the end"--Revelation
• omelet — Noun – English ～ beaten eggs or an egg mixture cooked until just set; may be folded around e.g. ham or cheese or jelly
• omelette — Noun – English ～ beaten eggs or an egg mixture cooked until just set; may be folded around e.g. ham or cheese or jelly
• omen — Noun – English ～ a sign of something about to happen; "he looked for an omen before going into battle"
• omental bursa — Noun – English ～ an isolated part of the peritoneal cavity that is dorsal to the stomach
• omentum — Noun – English ～ a fold of peritoneum supporting the viscera
• omeprazole — Noun – English ～ antacid (trade name Prilosec) that suppresses acid secretion in the stomach
• omerta — Noun – English ～ a code of silence practiced by the Mafia; a refusal to give evidence to the police about criminal activities
• omicron — Noun – English ～ the 15th letter of the Greek alphabet
• omission — Noun – English ～ neglecting to do something; leaving out or passing over something
• omission — Noun – English ～ any process whereby sounds or words are left out of spoken words or phrases
• omission — Noun – English ～ something that has been omitted; "she searched the table for omissions"
• omission — Noun – English ～ a mistake resulting from neglect
• omiya — Noun – English ～ a city of east central Honshu; a suburb of Tokyo
• ommastrephes — Noun – English ～ extremely active cylindrical squid with short strong arms and large rhombic terminal fins
• ommatidium — Noun – English ～ any of the numerous small cone-shaped eyes that make up the compound eyes of some arthropods

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