ˈprōpə̇l, -ōˌpil noun
( -s )
Etymology: International Scientific Vocabulary prop- + -yl
: either of two isomeric alkyl radicals C 3 H 7 derived from propane and isopropane:
a. : the normal radical CH 3 CH 2 CH 2 − — called also n-propyl
b. : isopropyl