bird's-mouth / लकड़ी या पत्थर में काटा हुआ भीतरी ओर के मुखवाला कोण;
Synonym bird's mouth;
English Dictionary:
1. Bird's-mouth [n.]
- 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.