bird's mouth

noun Carpentry.

a right-angled notch cut in the underside of a rafter for fitting over a longitudinal member, as a wall plate.

Origin of bird's mouth

First recorded in 1815–25

Words nearby bird's mouth

bird table, bird walk, bird watcher, bird's beak, bird's eye view, bird's mouth, bird's nest, bird's-eye, bird's-eye chilli, bird's-eye maple, bird's-eye primrose