Architecture. A central stone at the summit of an arch, locking the whole together; the keystone of an arch.
| 单词 | θ228937 |
| 释义 | society > leisure > the arts > visual arts > architecture > arch > [noun] > parts of > keystone (6) key1608 Architecture. A central stone at the summit of an arch, locking the whole together; the keystone of an arch. keystonea1637 A central stone at the summit of an arch or vault, locking the whole together. Also: an ornamental relief or boss decorating such a stone. key-piece1669 (a) Architecture = sense A. 10b; (b) Engineering = sense A. 10c. sagitta1703 Architecture. The key-stone of an arch. key block1823 A block placed at the summit of an arch or other structure, locking the whole together; a keystone. Subcategories:— shoulder (1) |
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