A substance or force that drives something out or causes expulsion.
From Latin 'expellens,' present participle of 'expellere' (to drive out). The '-ant' suffix marks it as something that performs or causes an action.
Expellant is the technical word for anything that *pushes something out*—like the gas cartridge in an epi-pen that propels medicine, or the pressure that expels air from your lungs when you cough.
Complete word intelligence in one call. Free tier — 50 lookups/day.