penta-

(word root) five

Examples of words with the root penta-: pentagram

penta-

or pent-

pref.

Five: pentamerous.

[Greek, from pente, five; see penk^we in Indo-European roots.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

penta-

combining form

five: pentagon; pentameter; pentaprism.

[from Greek pente five]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

penta-

a combining form meaning “five”: pentavalent. Also, esp. before a vowel,pent-.

[< Greek pent-, penta-, comb. forms representing pénte five]

Mentioned in

References in periodicals archive

Studies in rats and mice have found that penta- and octa-BDEs disrupt development.

Toxic leftovers: microbes convert flame retardant

These compounds, being large and bulky, cross the cell membrane with difficulty, rendering them less toxic than their penta- and octa-brominated counterparts.

PBDEs in breast milk: levels higher in United States than in Europe

Moisture contents of penta- and copper naphthenate-treated pole sections became more uniform over the 3-month outdoor exposure, but the untreated poles remained wet (Fig.

Effect of initial preservative treatment on electrical conductivity in Douglas-fir pole sections

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