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What is o

o

The fifteenth letter of the English alphabet, a vowel. Any spoken sound represented by the letter O or o, as in box, note, short, or love. Something having the shape of an O. A written or printed representation of the letter O or o. A device, as a printer's type, for reproducing the letter O or o. (used before a name in direct address, especially in solemn or poetic language, to lend earnestness to an appeal): Hear, O Israel! (used as an expression of surprise, pain, annoyance, longing, gladness, etc.) The exclamation “O.” Old. Grammar. object. The fifteenth in order or in a series. The Arabic cipher; zero. (sometimes lowercase) the medieval Roman numeral for

11.Compare Roman numerals. Physiology. a major blood group, usually enabling a person whose blood is of this type to donate blood to persons of group O, A, B, or AB and to receive blood from persons of group O.Compare ABO system. Chemistry. oxygen. Logic. particular negative. An abbreviated form of of, as in o'clock or will-o'-the-wisp. An abbreviated form of on. A prefix meaning “descendant,” in Irish family names: O'Brien; O'Connor. An abridgment of ortho-. Variant of ob- before m: omission. Variant of oo-: oidium. Pint. Octavo. Off. Old. Only. Order. Baseball. out; outs. A suffix occurring as the final element in informal shortenings of nouns (ammo; combo; condo; limo; promo); -o also forms nouns, usually derogatory, for persons or things exemplifying or associated with that specified by the base noun or adjective (cheapo; pinko; sicko; weirdo; wino). A suffix occurring in colloquial noun or adjective derivatives, usually grammatically isolated, as in address: cheerio; kiddo; neato; righto. The typical ending of the first element of compounds of Greek origin (as -i- is, in compounds of Latin origin), used regularly in forming new compounds with elements of Greek origin and often used in English as a connective irrespective of etymology: Franco-Italian; geography; seriocomic; speedometer. (in prescriptions) a pint. Ocean. Octavo. October. Ohio. Old. Ontario. Oregon. The 15th letter of the Greek alphabet (O, o). The vowel sound represented by this letter. The 15th letter and fourth vowel of the modern English alphabet Any of several speech sounds represented by this letter, in English as in code, pot, cow, move, or form Another name for nought Chem oxygen A human blood type of the ABO groupSee universal donor Logic a particular negative categorial proposition, such as some men are not married: often symbolized as SoPCompare A, E, I 2 Australian slang offence A variant spelling of oh An exclamation introducing an invocation, entreaty, wish, etcO God!; O for the wings of a dove! Short for ortho- (def.
4) Informal, or archaic shortened form of of a cup o' tea Forming informal and slang variants and abbreviations, esp of nounswino; lie doggo; Jacko The 15th letter in the Greek alphabet (Ο, ο), a short vowel, transliterated as o Used to connect elements in a compound wordchromosome; filmography Compare -i-

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