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cephalhydrocele

[sĕf′əl-hī′drə-sēl′]
n.
  1. Effusion of cerebrospinal fluid beneath the scalp in fractures of the skull.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.