/ ˈpʌljʊleɪt; NAmE / verb [ v ] ( formal )
1.
to breed or spread quickly
2.
to be full of life or activity
► pul·lu·lat·ing adjective :
a pullulating mass of people
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WORD ORIGIN
early 17th cent.: from Latin pullulat- sprouted, from the verb pullulare , from pullulus , diminutive of pullus young animal.