primer
pri-mer
noun
A small explosive device used to ignite a larger main charge.
"The firing pin struck the primer."
noun
A basic introductory book or course on a particular subject.
"This book serves as a primer on economics."
noun
A preparatory coating applied to a surface before painting or make-up.
"Always use a primer before applying the topcoat."
Thesaurus
Synonyms: priming, primer coat, priming coat, flat coat, undercoat, ground, fuze, fuse, fusee, fuzee