culdocentesis

[kŭl′dō-sĕn-tēsĭs, kul′-]
n.
  1. Aspiration of fluid from the rectouterine space by puncture of the vaginal vault near the midline between the uterosacral ligaments.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.