pullulating
adjective
[ ˈpʌljʊleɪtɪŋ ]
• very crowded and lively; teeming.
• "the towers of our pullulating megalopolis"
pullulate
verb
• multiply or spread prolifically or rapidly.
• "the countless rats that pullulate in the mine"
Origin:
early 17th century: from Latin pullulat- ‘sprouted’, from the verb pullulare, from pullulus, diminutive of pullus ‘young animal’.
