D defs.my
Entry 1 sense Webster, 1913

mutagen

/(mū"tȧ*jĕn)/ · mu·ta·gen · IPA /ˈmjuːtəd͡ʒn̩/
01 n. A chemical compound or other external influence (such as ionizing radiation) which causes mutations{3}.
  1. 1.
    A chemical compound or other external influence (such as ionizing radiation) which causes mutations{3}.