(entomology, informal) A stinging ant (Paraponera clavata) the toxin of which causes intense pain for about a day, native to Central and South America.

(idiomatic, informal) To have a narrow escape; to avoid injury, disaster, or some other undesirable situation.

(slang) Hollow bullet designed to pierce bullet-proof vests.

plural of magic bullet

(idiomatic) A simple remedy for a difficult or complex problem, especially a cure for a disease.

(surgery) A surgical procedure whereby small portions of the lung, called bulla, are removed. Bulla are large areas (> 1 cm in diameter) in the lung filled with oxygen-depleted air

Alternative spelling of bulletproof (Capable of withstanding a direct shot, reliable, or unbreakable).

plural of bulletin board

plural of bulletin

(of text) Set off by bullet points.