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octo-

  1. variant of octa-: octosyllabic.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for octo-

octo-

octa- or before a vowel oct-

combining form
  1. eightoctosyllabic; octagon
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Word Origin

from Latin octo, Greek okto
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 octo-

word-forming element, before vowels oct-, from comb. form of Latin octo "eight" (see octa-).

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Online Etymology Dictionary, © 2010 Douglas Harper

octo- in Medicine

octo-

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