ˈ ̷ ̷ˌ ̷ ̷ noun
( plural bird's-mouths )
: an interior angle of notch cut across the end of a piece of timber to receive the edge of another piece
ˈ ̷ ̷ˌ ̷ ̷ noun
( plural bird's-mouths )
: an interior angle of notch cut across the end of a piece of timber to receive the edge of another piece
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012