a substance, such as a liquid, foam, powder, etc, used in extinguishing fires
extinguishant in American English
(ikˈstɪŋɡwɪʃənt)
noun
a substance used in extinguishing fires
Word origin
[extinguish + -ant]-ant is a suffix forming adjectives and nouns from verbs, occurring originally in Frenchand Latin loanwords (pleasant; constant; servant) and productive in English on this model; -ant has the general sense “characterized by or serving in the capacity of” that namedby the stem (ascendant; pretendant), esp. in the formation of nouns denoting human agents in legal actions or otherformal procedures (tenant; defendant; applicant; contestant). In technical and commercial coinages, -ant is a suffix of nouns denoting impersonal physical agents (propellant; lubricant; deodorant). In general, -ant can be added only to bases of Latin origin, with a very few exceptions, as coolant
Examples of 'extinguishant' in a sentence
extinguishant
He was soon put in charge of a second plant making a fire extinguishant.