Definition of persister in English:

persister

Pronunciation /pəˈsɪstə/

noun

  • 1A person who persists in doing something; a persistent person.

  • 2Microbiology
    A bacterium which continues to live in the presence of enough antibiotic to kill almost all members of its species.

Origin

Early 17th century; earliest use found in John Florio (1553–1625), author and teacher of languages. From persist + -er.