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 (răb′dəm, -dŏm′)
A rodlike structure in the center of each ommatidium in the compound eye of an arthropod, composed of microvilli extending from the surrounding retinular cells.

[From Greek rhabdōma, bundle of rods, from Greek rhabdos, rod; see rhabdomancy.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Zoology) any of many similar rodlike structures found in the eyes of insects
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈræb dəm, -dɒm)

any of various small, rod-shaped anatomical structures.
[1875–80; < Late Greek rhábdōma bundle of rods; see rhabdo-, -oma]
rhab•do•mal (ræbˈdoʊ məl, ˈræb də məl) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
Cuttlefish eyes have a well-marked strip of longer rhabdomes above the equator of the retina and an especially close-packed region of rhabdomes at the posterior end of the retina (Young, 1963).
The rhabdomes and supporting cells cover much of the internal surface of the eye; but, near to the cornea, the rhabdomes are absent.
The long, dark lines of the rhabdomes of the apposed photoreceptor neurons (Takenaka et al., 1993) may be seen especially well in Figure 3B, forming a within the arms of the pigment cells.