keystone

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Related to keystones: keystone arch
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Synonyms for keystone

Synonyms for keystone

a central cohesive source of support and stability

the central building block at the top of an arch or vault

References in classic literature ?
The decline of day here was very gorgeous; tingeing the firmament deeply with red and gold, up to the very keystone of the arch above us.
Information: Keystone Symposia, 221 Summit Place #272, Drawer 1630, Silverthorne, CO 80498 USA, 800-253-0685, fax: 970-262-1525, e-mail: info@keystonesymposia.
Information: Keystone Symposia, 221 Summit Place #272, Drawer 1630, Silverhome, CO 80498 USA, 800-253-0685 fax: 970-262-1525, e-mail: info@keystonesymposia.
Information: Information: Keystone Symposia, 221 Summit Place #272, Drawer 1630, Silverthorne, CO 80498 USA, 800-253-0685, Fax: 970-262-1525, e-mail: info@keystonesymposia.