"the act of germinating or budding," 1640s, noun of action from pullulate.
Entries linking to pullulation
pullulate v.
"to germinate, bud," 1610s, from Latin pullulatus, past participle of pullulare "put forth, grow, sprout, shoot up, come forth," from pullulus, diminutive of pullus "young animal" (from PIE root *pau- (1) "few, little"). Related: Pullulated; pullulating.