A strip of sheet metal placed at the junction of exterior building surfaces to render the joint watertight.

Vaporization of volatile liquids by either heat or vacuum.

Burning brick in an intermittent air supply in order to impart irregular color to the bricks.

The violent expulsion of small metal particles due to arcing during flash butt welding.

The apparent filling of a curved mirror or lens with light when viewed from a distance, as a result of the production of a parallel beam by a light source at the focus.