razorbill

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A razor-billed auk.

Century Dictionary and Cyclopedia

1. n. The razor-billed auk, or tinker, Alca or Utamania torda, so called from the deep, compressed, and trenchant bill. The bill is feathered for about one half its length, in the rest of its extent being vertically furrowed, and hooked at the tip; one of the furrows is white, the bill being otherwise black, like the feet; the month is yellow. The plumage is black on the upper parts, the lower parts from the neck in summer, and from the bill in winter, being white; there is a narrow white line from the bill to the eye, and the tips of the secondaries are white. The bird is about 18 inches long, and 27 in extent of wings. It inhabits arctic and northerly regions of both hemispheres, subsists chiefly on fish, and nests on rocky sea-coasts, laying a single egg about 3 by 2 inches, white or whitish, spotted and blotched with different shades of brown. The flesh is eatable.
2. n. The skimmer or cutwater, Rhynchops nigra. See skimmer and Rhynchops.

Wiktionary

1. n. A large black and white auk, Alca torda, native to the north Atlantic.

GNU Webster's 1913

1. n. A species of auk (Alca torda) common in the Arctic seas. See auk, and Illust. in Appendix.
2. n. See cutwater, 3.

WordNet 3.0

1. n. black-and-white northern Atlantic auk having a compressed sharp-edged bill