'Sheathbill' definitions:

Definition of 'Sheathbill'

From: GCIDE
  • Sheathbill \Sheath"bill`\, n. (Zool.) Either one of two species of birds composing the genus Chionis, and family Chionidae, native of the islands of the Antarctic seas. [1913 Webster]
  • Note: They are related to the gulls and the plovers, but more nearly to the latter. The base of the bill is covered with a saddle-shaped horny sheath, and the toes are only slightly webbed. The plumage of both species is white. [1913 Webster]