Lark's tongue

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For the bird whose tongue was used in ancient recipes, see lark. For the 1973 work by King Crimson, see Larks' Tongues in Aspic.
A chamfer with a lark's tongue end
A chamfer with a lark's tongue end

A lark's tongue is a woodworking technique where a chamfer (bevel) does not go to the end of the piece, but "lifts out" in a smooth curve.