Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A small body surrounded by many nerve fibers, consisting of an anastomosis between fine arterioles and veins.

from The Century Dictionary and Cyclopedia

  • n. A coil of choroid plexus extending into either lateral ventricle of the brain.
  • n. A coil of blood-vessels projecting into the body-cavity, or cœloma, in the region of the pronephros in the embryos of the lower vertebrates. (See cut in next column.)

Etymologies

Latin.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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