one of the radial elements composing a compound eye.
- om·ma·tid·i·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use ommatidium in a sentence
The ommatidium is from the first segregate and consists of few cells.
The cells of the ommatidium are a good deal larger than the neighbouring common cells of the epidermis.
The ommatidium (soft structure beneath the lens-unit of a compound eye) is very simple in both Scorpio and Limulus.
Each of these facets is the external window of an eye element or ommatidium.Elementary Zoology, Second Edition | Vernon L. Kellogg
ommatidium -ia: one of the elements of which the compound eye is composed.Explanation of Terms Used in Entomology | John. B. Smith
British Dictionary definitions for ommatidium
any of the numerous cone-shaped units that make up the compound eyes of some arthropods
- ommatidial, adjective
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
Scientific definitions for ommatidium
One of the tiny light-sensitive parts of the compound eye of insects and other arthropods. An ommatidium resembles a single simplified eye. See more at compound eye.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.