: a rather large chiefly sooty brown and white shearwater (Puffinus gravis or Procellaria gravis) of the eastern coast of No. and So. America
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a sooty-brown and white shearwater, Puffinus gravis, of eastern coasts of the Western Hemisphere.
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greater shearwater,
a dark-brown shearwater that lives in the Atlantic Ocean from near the Arctic Circle to southern South America and South Africa.
Useful english dictionary. 2012.