self-priming

noun

1. the powder or other material used to ignite a charge.
2. the act of a person or thing that primes.
3. material used as a primer, or a first coat or layer of paint, size, etc.

noun

1. something used to prime
2. a substance, used to ignite an explosive charge

n.“first coat of paint,” c.1600, verbal noun from prime (v.). Meaning “gunpowder in the pan of a firearm” is from 1590s.