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buckstay

noun
variants: or less commonly buckstave \ ˈ⸗ˌ⸗ \
plural -s

Definition of buckstay

: either of two connected girders used one on each side of the masonry structure of a furnace or flue to take the thrust of an arch also : any girder similarly used as a stay

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History and Etymology for buckstay

buck entry 1 (steel support) + stay or stave

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