from The American Heritage® Dictionary of the English Language, 4th Edition
- n. One of the structural elements, resembling a single simplified eye, that make up the compound eye of insects and other arthropods.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. One of the conical substructures which make up the eyes of invertebrates.
from the GNU version of the Collaborative International Dictionary of English
- n. One of the single eyes forming the compound eyes of crustaceans, insects, and other invertebrates; one of the eyes of an ommateum.
from The Century Dictionary and Cyclopedia
- n. A radial element or segment of the compound eye of an arthropod.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any of the numerous small cone-shaped eyes that make up the compound eyes of some arthropods
New Latin, diminutive of Greek omma, ommat-, eye; see okw- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From the stem form of Ancient Greek ὄμμα (omma, "eye") + -idium. (Wiktionary)