say it: pruh-PEL-uhnt
propellant is a noun and adjective meaning "any substance that propels". It carries 2 recorded senses.
any substance that propels
tending to or capable of propelling
“propellant fuel for submarines”
“the faster a jet plane goes the greater its propulsive efficiency”
“universities...the seats of propulsive thought”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for propellant come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.