Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A marine mammal (Grampus griseus) having a bulbous head, a tall curved dorsal fin, and a gray body with white streaks or scars.
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[After Antoine Risso, (1777–1845), French naturalist born in Nice.]
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