Definition of bull shark
: an aggressive requiem shark (Carcharhinus leucas) of tropical to subtropical coastal waters that has a short, blunt snout and small eyes, is tolerant of freshwater and may spend extended periods in rivers, and has been known to attack people <Bull sharks—believed to be the culprits in the two recent Florida attacks—are especially pugnacious and often found in shallow water. — Prakash Gandhi et al.>
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