Arch brick

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Arch´ brick`

1.A wedge-shaped brick used in the building of an arch.
References in periodicals archive ?
After the firebox was levelled, I began with the most well-fitting nearly whole soft IFB brick on the lower courses for stability and progressed with more broken half arch brick as I progressed higher.
The soldier arch relies upon the rigidity of the wall at each side of the opening to hold the arch bricks into position.