ommatidia
Noun
The word is derived from ommatidium
Meaning
of Ommatidium
Source: Webster's dictionaryPhrases with the word
Examples
Aeshna interrupta has 22650 ommatidia of two varying sizes, 4500 being large.
The compound eyes of adults develop in a separate region of the head. citation New ommatidia are added in semicircular rows at the rear of the eye.
Petalura gigantea has 23890 ommatidia of just one size.