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near-earth object.


a combining form meaning “new,” “recent,” “revived,” “modified,” used in the formation of compound words:
neo-Darwinism; Neolithic; neoorthodoxy; neophyte.
Chemistry. a combining form used in the names of isomers having a carbon atom attached to four carbon atoms:
Also, especially before a vowel, ne-.
Origin of neo-
< Greek, combining form of néos; akin to new Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for NEO
Contemporary Examples
Historical Examples
  • It was in the NEO valley that the supreme efforts of the earthquake were manifested.

  • Remembering NEO's suggestion, I took also two other bottles of rum.

  • Hypatia started, as at a new thought, and confessed—as every NEO—Platonist would have done—that she had never done so.

    Hypatia Charles Kingsley
  • A few miles after entering the NEO valley, the throw of the fault reaches its maximum at Midori.

  • These we ate while NEO discoursed sadly upon the evil times that had befallen his reign.

  • “He got litt'ee broomee, an' sweep paint out litt'ee pipe on thing make ship's sails,” NEO explained.

British Dictionary definitions for NEO


combining form
(sometimes capital) new, recent, or a new or modern form or development: neoclassicism, neocolonialism
(usually capital) the most recent subdivision of a geological period: Neogene
Word Origin
from Greek neos new
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Contemporary definitions for NEO's 21st Century Lexicon
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Word Origin and History for NEO


word-forming element meaning "new, recent," used in a seemingly endless number of adjectives and nouns, mostly coined since c.1880, from Greek neo-, comb. form of neos "new, young, youthful; fresh, strange; lately, just now," from PIE root *newo- (see new).

Online Etymology Dictionary, © 2010 Douglas Harper
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NEO in Medicine

neo- pref.

  1. New; recent: neonatal.

  2. New and different: Neo-Freudian.

  3. New and abnormal: neoplasm.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Related Abbreviations for NEO


newborn (from "neonate")
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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