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Meaning of retinula

re•tin•u•la

Pronunciation: (ri-tin'yu-lu), [key]
— pl. n. -lae
  1. a group of elongate neural receptor cells forming part of an arthropod compound eye: each retinula cell leads to a nerve fiber passing to the optic ganglion.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.