Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A cluster of pigment-containing photosensitive cells in each ommatidium of the compound eye of an arthropod.
from The Century Dictionary.
- noun In entomology, a group of combined retinal cells, bearing a rhabdom.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Zoöl.) One of the group of pigmented cells which surround the retinophoræ of invertebrates. See
Illust. underommatidium .
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biology One of the group of
pigmented cells thatsurround theretinophorae ofinvertebrates .
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[New Latin rētinula, diminutive of Medieval Latin rētina, retina; see retina.]
from Wiktionary, Creative Commons Attribution/Share-Alike License
Latin, literally "small retina".
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Examples
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The remaining two principal photoreceptors (retinula cells R1 and R5) give rise to long visual fibres.
PLoS ONE Alerts: New Articles Peter Skorupski et al. 2010
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