a prefix occurring in loanwords from Greek (amphibious ); on this model, used with the meaning “two,” “both,” “on both sides,” in the formation of compound words: amphiaster.

< Greek, combining form of amphí on both sides; cognate with Latin amb(i)- ambi-, Albanian mbë; akin to Old English ymb(e)- around Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
1.  on both sides; at both ends; of both kinds: amphipod; amphitrichous; amphibious
2.  around: amphibole
[from Greek]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

from Gk. amphi- "both, of both kinds, on both sides, around," comb. form of amphi (round about, around); cognate with L. ambi- (see ambi-).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

amphi- or amph- or ampho-

  1. Both: amphibaric.

  2. On both sides: amphicentric.

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