rhabdomere
noun
rhab·do·mere ˈrab-də-ˌmir 
: a division of a rhabdom
Word History
Etymology
rhabdo- + -mere
Note: The term was introduced by E. Ray Lankester and A.G. Bourne in "The Minute Structure of the Lateral and of the Central Eyes of Scorpio and of Limulus," Quarterly Journal of Microscopical Science, vol. 23 (1883), new series, p. 183.
First Known Use
1883, in the meaning defined above