infrabulge

[ĭnfrə-bŭlj′]
n.
  1. The portion of the crown of a tooth gingival to the height of contour.
  2. The area of a tooth where the retentive portion of a clasp of a removable partial denture is placed.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.