This tools allows you to use Keystones™, Color Wheel™ Mosaics, and Color Wheel™ Retro to create your own one-of-a-kind mosaic tile. Our custom designer lets you save your designs to …

The meaning of KEYSTONE is the wedge-shaped piece at the crown of an arch that locks the other pieces in place. How to use keystone in a sentence.

A keystone (or capstone) is the wedge-shaped stone at the apex of a masonry arch or typically round-shaped one at the apex of a vault.

Oct 27, 2025 · Keystones were originally used to support arches and vaults, dating back to Ancient Mesopotamia and Egypt. Keystones now serve mostly decorative purposes in …

Keystone Exams will help school districts guide students toward meeting state standards. The exams are end-of-course assessments designed to assess proficiency in the subject areas of …

KEYSTONE definition: 1. the middle stone in the top of an arch that has a special shape and holds all the other stones…. Learn more.

KEYSTONE definition: the wedge-shaped piece at the summit of an arch, regarded as holding the other pieces in place. See examples of keystone used in a sentence.

It is not only a structural necessity but also often a decorative focal point in architectural design. The use of keystones dates back to ancient civilizations, including the Egyptians, Greeks and …

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Dec 8, 2024 · Keystone (noun): The central principle or part of a policy, system, etc., on which all else depends. The word "keystone" primarily refers to the central, wedge-shaped stone at the …