D defs.my
Entry 1 sense Webster, 1913

Butyl

/byo͞ot'-əl/ · Bu·tyl · IPA /ˈbjuːtɪl/
01 n. A compound radical, regarded as butane, less one atom of hydrogen.
  1. 1.
    A compound radical, regarded as butane, less one atom of hydrogen.(Chem.)