sea swallow

from The American Heritage® Dictionary of the English Language, 4th Edition

• n. Any of various terns, especially a common tern (Sterna hirundo) that breeds within the Arctic Circle.

from Wiktionary, Creative Commons Attribution/Share-Alike License

• n. The common tern.

from the GNU version of the Collaborative International Dictionary of English

• The common tern.
• The storm petrel.
• The gannet.
• See Cornish chough, under Chough.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• n. common tern of Eurasia and America having white black and grey plumage