[om.ma.tid.i.um] n, pl -tid.ia [NL, fr. Gk ommat-, omma eye; akin to Gk ops eye--more at eye] (1884): one of the elements corresponding to a small simple eye that make up the compound eye of an arthropod -- om.ma.tid.i.al adj
OMMATIDIUM
Meaning of OMMATIDIUM in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012