General

A brick of high strength whose blue color results from firing in a kiln in a flame of low oxygen […]

A small hole in a mold or plaster cast, formed by trapped air.

Localized buckling or shattering of rigid pavement caused by excessive longitudinal pressure.

A fatty oil that has been oxidized by blowing air through it while it is hot; sometimes mixed with mineral

A plumbing joint in a lead pipe, formed with the use of a blowtorch.