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See more synonyms for septi- on Thesaurus.com
  1. a combining form meaning “seven,” used in the formation of compound words: septilateral.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for septi-


before a vowel sept-

combining form
  1. sevenseptivalent
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Word Origin

from Latin septem


combining form
  1. septumsepticidal
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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

Word Origin and History for septi-

before vowels sept-, word-forming element meaning "seven," from Latin septem (see seven).

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Online Etymology Dictionary, © 2010 Douglas Harper

septi- in Medicine


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