1. rapid multiplication or breeding; the act of reproducing abundantly
Usage: formal; biological contexts
2. the state of swarming or teeming with life
Usage: formal; literary

Examples

• The pullulation of bacteria in the petri dish was remarkable.
• Scientists studied the pullulation of insects during the warm season.
• The pond showed signs of pullulation with various microorganisms.
• The pullulation of weeds in the abandoned lot created a dense thicket.
• Researchers documented the pullulation of coral polyps on the reef.
• The pullulation of algae turned the lake green.