'Retinula' definitions:
Definition of 'Retinula'
From: GCIDE
- Retinula \Re*tin"u*la\, n.; pl. Retinulae. [NL., dim. of NL. & E. retina.] (Zool.) One of the group of pigmented cells which surround the retinophorae of invertebrates. See Illust. under Ommatidium. [1913 Webster]