Having a mouth or opening shaped like a bird's beak; characterized by a narrow, pointed opening or protrusion.
Compound of 'bird' (Old English 'brid'), 'mouth' (Old English 'múð'), with adjectival suffix '-ed'. Technical term used in woodworking and construction to describe specific joint shapes.
In carpentry, a 'birdmouth cut' is a notch that allows rafters to sit on walls—carpenters named it for the resemblance to a bird's open mouth, showing how technical terminology borrows from nature observation.
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