a triangular right-angled notch formed in the end of a timber (timber, n.1 3a) to enable it to be securely fixed to a rectangular timber.
| 单词 | θ98689 |
| 释义 | the world > space > shape > angularity > [noun] > angle or corner > internal or pointing inward > cut out of a piece of timber (1) bird's mouth1755 a triangular right-angled notch formed in the end of a timber (timber, n.1 3a) to enable it to be securely fixed to a rectangular timber. |
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