noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   One of the group of pigmented cells that surround the retinophorae of invertebrates.

Etymology

Borrowed from New Latin rētinula, diminutive of Medieval Latin rētina. By surface analysis, retin(a) + -ula.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.