Bird's-mouth

Bird's-mouth`

(Arch.) An interior angle or notch cut across a piece of timber, for the reception of the edge of another, as that in a rafter to be laid on a plate; - commonly called crow's-foot in the United States.

bird's-mouth

bird’s-mouth

1. A notch cut across the grain at one end of a timber for its reception on the edge of another piece, such as a wall plate. 2. The angle between two components, usually between 90 and 180 degrees.

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