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voussoir
voussoir
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Số nhiều: voussoirs
This term is highly specialized, used almost exclusively in architecture, masonry, and civil engineering. It describes the individual tapered units that comprise an arch, where the central-most stone is specifically termed the keystone. Because it refers to a precise geometric shape designed to distribute weight, it is rarely used in casual conversation.
In a technical context, the term emphasizes the structural necessity of the wedge shape to prevent the arch from collapsing inward. It is a formal noun that describes a physical component of a load-bearing system, distinguishing it from decorative facing stones.
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