NCI Dictionary of Genetics Terms

  • Resize font
  • Print
  • Email
  • Facebook
  • Twitter
  • Google+
  • Pinterest

Welcome to the NCI Dictionary of Genetics Terms, which contains technical definitions for more than 150 terms related to genetics. These definitions were developed by the PDQ® Cancer Genetics Editorial Board to support the evidence-based, peer-reviewed PDQ cancer genetics information summaries.

presymptomatic testing
(PREE-simp-toh-MA-tik TES-ting)
Genetic analysis of an asymptomatic or unaffected individual who is at risk of a specific genetic disorder.