nonabsorbable suture

[nŏn′əb-zôrbə-bəl]
n.
  1. A surgical suture made from a material unaffected by the biological activities of the body tissues, and therefore permanent unless removed.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.