retinula

noun

re·​tin·​u·​la re-ˈtin-yə-lə 

plural retinulae re-ˈtin-yə-ˌlē 

-ˌlī

also retinulas

: the neural receptor of a single facet of an arthropod compound eye

retinular

re-ˈtin-yə-lər 

adjective

Word History

Etymology

New Latin, diminutive of Medieval Latin retina

First Known Use

1878, in the meaning defined above