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a prefix in loanwords from Greek, where it means “up,” “against,” “back,” “re-”: anabasis; used in the formation of compound words:
Also, especially before a vowel, an-.
Origin of ana-
< Greek, combining form of aná; no necessary relation to on Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for ana-


up; upwards: anadromous
again: anagram
back; backwards: anatropous
Word Origin
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
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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).

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

ana- pref.

  1. Upward; up: anacrotic.

  2. Backward; back: anaplasia.

  3. Again; anew: anabiosis.

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