Howship's lacuna

[houshĭps]
n.
  1. Any of the tiny depressions, pits, or irregular grooves in bone that is being resorbed by osteoclasts.resorption lacuna
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.