D defs.my
Entry 1 sense Webster, 1913

ethyl mercaptan

· eth·yl mer·cap·tan · IPA
01 A gaseous substance (C2H5.SH) used as an odorant in natural gas and propane to facilitate detection and serve as a warning of leaks.
  1. 1.
    A gaseous substance (C2H5.SH) used as an odorant in natural gas and propane to facilitate detection and serve as a warning of leaks.(Chem.)