1. Also eth·moi·dal. of or relating to a bone at the base of the cranium and the root of the nose, containing numerous perforations for the filaments of the olfactory nerve.
  1. the ethmoid bone.

Origin of ethmoid

1735–45; < Greek ēthmoeidḗs sievelike; see -oid
Related formspost·eth·moid, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ethmoid

Historical Examples of ethmoid

British Dictionary definitions for ethmoid


adjective Also: ethmoidal
  1. denoting or relating to a bone of the skull that forms part of the eye socket and the nasal cavity
  1. the ethmoid bone

Word Origin for ethmoid

C18: from Greek ēthmoeidēs like a sieve, from ēthmos sieve, from ēthein to sift
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

ethmoid in Medicine


  1. Resembling a sieve.
  1. The ethmoid bone.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.