propellant
pruh pe luhnt
- n any substance that propels
- s tending to or capable of propelling
propellant fuel for submarines
- The farther you're going, the more propellant you need, but every pound of it you add means more mass the engine must propel, which requires more fuel still, and on and on.
- A smokeless, solid-propellant, dual-thrust rocket motor propels the missile.
- Liquid-propellant engines or solid-propellant motors can be used on either.