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ana-

  1. a prefix in loanwords from Greek, where it means “up,” “against,” “back,” “re-”: anabasis; used in the formation of compound words: anacardiaceous.
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Also especially before a vowel, an-.

Origin of ana-

< Greek, combining form of aná; no necessary relation to on
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for ana-

ana-

before a vowel an-

prefix
  1. up; upwardsanadromous
  2. againanagram
  3. back; backwardsanatropous
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Word Origin for ana-

from Greek ana
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

Word Origin and History for ana-

before verbs an-, prefix meaning 1. "upward," 2. "back, backward, against," 3. "again, anew," from Greek ana- "up to, toward, exceedingly, back, against," from ana "up, on, upon, throughout, again," cognate with Old English on, from PIE root *ano- "on, upon, above" (see on).

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Online Etymology Dictionary, © 2010 Douglas Harper
ana- in Medicine

ana-

pref.
  1. Upward; up:anacrotic.
  2. Backward; back:anaplasia.
  3. Again; anew:anabiosis.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.