from The Century Dictionary.

  • In the compound eye of the trilobites, that type in which the corneal lenses are separated by interstitial portions of the sclera or test: contrasted with holochroal. See holochroal.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective of eyes With compound lenses, each with separate cornea, each lens separated from others by deep scleral walls and forming an image; the corneal membrane extends downward into sclera.


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