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deep perineal space

n.
  1. The cleft between the superior and inferior fasciae of the urogenital diaphragm, occupied by the membranous part of the urethra, the bulbourethral gland (male), the deep transverse perineal and sphincter urethrae muscles, and the dorsal nerve and artery of the penis or clitoris.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.