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O, o

noun, plural O's or Os; o's or os or oes.
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.


noun Scot.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
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Kenzaburo (kɛnzəˈbʊrəʊ). born 1932, Japanese novelist and writer; his books include The Catch (1958), A Personal Matter (1964), and Silent Cry (1989): Nobel prize for literature 1994

abbreviation for
Old English (language)

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

found in Gk. borrowings into Latin, represtenting Gk. -oi-. Words with -oe- that came early into Eng. from O.Fr. or M.L. usually already had been leveled to -e- (e.g. economic, penal, cemetery), but later borrowings directly from L. or Gk. tended to retain it at first (oestrus, diarrhoea, amoeba) as
did proper names (Oedipus, Phoebe, Phoenix) and purely technical terms. British English tends to be more conservative with it than American, which has done away with it in all but a few instances. It also occurred in some native L. words (foedus "treaty, league," foetere "to stink," hence occasionally in Eng. foetid, foederal, which was the form in the original publications of the "Federalist" papers). In these it represents an ancient -oi- in Old Latin (e.g. O.L. oino, Classical L. unus), which apparently passed through an -oe- form before being leveled out but was preserved into Classical L. in certain words, especially those belonging to the realms of law (e.g. foedus) and religion, which, along with the vocabulary of sailors, are the most conservative branches of any language in any time, through a need for precision, immediate comprehension, demonstration of learning, or superstition. But in foetus it was an unetymological spelling in L. that was picked up in Eng. and formed the predominant spelling of fetus into the early 20c.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Abbreviations & Acronyms
Old English
Office of Employment Security
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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