from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A transparent rod in the center of each ommatidium in the compound eye of an arthropod.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of the rods that support each ommatidium in the compound eye of arthropods
from the GNU version of the Collaborative International Dictionary of English
- n. One of numerous minute rodlike structures formed of two or more cells situated behind the retinulæ in the compound eyes of insects, etc. See Illust. under ommatidium.
from The Century Dictionary and Cyclopedia
- n. In entomology, a special structure in the eye, consisting of a concrescence of the rods developed on the cells of the retina, when these cells are themselves united in a retinula.
From Greek rhabdōma, bundle of rods, from Greek rhabdos, rod; see rhabdomancy.(American Heritage® Dictionary of the English Language, Fourth Edition)
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