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hepta-

1.
a combining form meaning “seven,” used in the formation of compound words:
heptahedron.
Also, especially before a vowel, hept-.
Origin
< Greek, combining form of heptá seven; cognate with Latin septem; akin to Old English seofon seven
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for hept

hepta-

combining form
1.
seven: heptameter
Word Origin
from Greek
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 hept

hepta-

before vowels hept-, word-forming element meaning "seven," from Greek hepta "seven" (see seven).

Online Etymology Dictionary, © 2010 Douglas Harper
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hept in Medicine

hepta- or hept-
pref.

  1. Seven: heptameter.

  2. Containing seven atoms, molecules, or groups: heptane.

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