1. near-earth object.

  1. a combining form meaning “new,” “recent,” “revived,” “modified,” used in the formation of compound words: neo-Darwinism; Neolithic; neoorthodoxy; neophyte.
  2. Chemistry. a combining form used in the names of isomers having a carbon atom attached to four carbon atoms: neoarsphenamine.

combining form

  1. (sometimes capital) new, recent, or a new or modern form or developmentneoclassicism; neocolonialism
  2. (usually capital) the most recent subdivision of a geological periodNeogene

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). pref.

  1. New; recent:neonatal.
  2. New and different:Neo-Freudian.
  3. New and abnormal:neoplasm.
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