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deutero-

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  1. a combining form meaning “second,” used in the formation of compound words: deuterocanonical.
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Also especially before a vowel, deuter-.

Origin of deutero-

< Greek, combining form of deúteros
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for deutero-

deutero-

deuto-, before a vowel deuter- or before a vowel deut-

combining form
  1. second or secondarydeuterogamy; deuterium
  2. (in chemistry) indicating the presence of deuterium
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Word Origin

from Greek deuteros second
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
deutero- in Medicine

deutero-

pref.
  1. Second; secondary:deuteropathy.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
deutero- in Science

deutero-

  1. A prefix meaning “second” or “secondary,” as in deuterostome, an animal whose mouth is the second opening to develop.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.