Sea swal·low
1. Zool. (a) The common tern. (b) The storm petrel. (c) The gannet.
2. Her. See Cornish chough, under Chough.
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Chough n. Zool. A bird of the Crow family (Fregilus graculus) of Europe. It is of a black color, with a long, slender, curved bill and red legs; -- also called chauk, chauk-daw, chocard, Cornish chough, red-legged crow. The name is also applied to several allied birds, as the Alpine chough.
Cornish chough Her., a bird represented black, with red feet, and beak; -- called also aylet and sea swallow.
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Cor·nish a. Of or pertaining to Cornwall, in England.
Cornish chough. See Chough.
Cornish engine, a single-acting pumping engine, used in mines, in Cornwall and elsewhere, and for water works. A heavy pump rod or plunger, raised by the steam, forces up the water by its weight, in descending.