from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A North American swallow (Petrochelidon pyrrhonota) that builds a bottle-shaped nest of mud, grass, and twigs on the face of a cliff or bluff or under the eaves of a roof.
from the GNU version of the Collaborative International Dictionary of English
- n. a North American swallow (Petrochelidon lunifrons), which builds its nest against cliffs; the eaves swallow.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. North American swallow that lives in colonies and builds bottle-shaped mud nests on cliffs and walls
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