a combining form occurring in loanwords from Greek, meaning “five” (Pentateuch); on this model, used in the formation of compound words (pentavalent).
"EVERYDAY" VS. "EVERY DAY" QUIZ: IS IT ONE WORD OR TWO?
An everyday activity is one you do every day. (Thanks, English.) Practice using "everyday," one word, and "every day," two words, in this fun quiz with … everyday example sentences!
Question 1 of 16
“Everyday" is an adjective that describes things that happen habitually or items that are normal items or events.
Also especially before a vowel, pent-.
Origin of penta-
< Greek pent-, penta-, comb. forms representing pénte five
Words nearby penta-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for penta-
fivepentagon; pentameter; pentaprism
Word Origin for penta-
from Greek pente five
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
Medical definitions for penta-
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.