corneule
(ˈkɔːniː(j)uːl)
[a. F. cornéule, dim. of cornée cornea.]
One of the minute facets of the compound eyes of insects; = corneole.
| 1839 Todd Cycl. Anat. II. 960/1 Each facet, or..corneule, is the proper cornea of a distinct eye. Ibid., Immediately behind each corneule is a layer of dark-coloured pigment. |