plural of protected membrane roof

(electricity) A device, usually a fuse, polyfuse, or circuit breaker, intended to detect and stop an overcurrent condition.

An indication of how long a sunscreen remains effective when applied to the skin.

(roofing) an insulated and ballasted roofing assembly in which the insulation and ballast are applied on top of the membrane (sometimes referred to as an "inverted roof assembly").

(history) Synonym of Berlin Wall (from the perspective of East Germany).

(informal, derogatory) The Sonny Bono Copyright Term Extension Act.