\Rhab"dom\ (r[a^]b"d[o^]m), n. [Gr. "ra`bdwma a bundle
of rods, fr. "ra`bdos a rod.] (Zo["o]l.)
One of numerous minute rodlike structures formed of two or
more cells situated behind the retinul[ae] in the compound
eyes of insects, etc. See Illust. under {Ommatidium}.