| any of several small, tube-nosed seabirds of the family Hydrobatidae, usually having black or sooty-brown plumage with a white rump. |
| storm petrel n. Any of various small sea birds of the family Hydrobatidae, especially Hydrobates pelagicus, of the North Atlantic and the Mediterranean, having sooty plumage and a white rump. Also called stormy petrel. |
