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Penta-

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penta-

a combining form occurring in loanwords from Greek, meaning “five” (Pentateuch); on this model, used in the formation of compound words (pentavalent).
Also, especially before a vowel, pent-.


Origin:
< Gk pent-, penta-, comb. forms repr. pénte five
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To Penta-
penta- or pent-  
pref.  Five: pentamerous.

[Greek, from pente, five; see penkwe in Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

penta- 
comb. form meaning "five," from Gk. penta- (before a vowel, pent-), from pente "five," related to Aeolian pempte (see five).
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

penta- or pent-
pref.

  1. Five: pentameter.

  2. Containing five atoms, molecules, or groups: pentose.

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