• (n.) One of the several parts composing a rhabdom.
(from the article `photoreception`) ...The entire epithelium (skin) of the annelid earthworm Lumbricus contains isolated light-sensitive cells that are eyespots. These photoreceptor ... The envelopment of rhabdomeres by pigment migration is widespread in invertebrates. An example of this phenomenon occurs in the ommatidium of the ... ...
Rhab'do·mere noun [ Rhabdom + -mere .] (Zoology) One of the several parts composing a rhabdom. 
rhabdomere One of the several parts composing a rhabdom.