plural of fire opal

Any transparent to translucent opal with a warm body colour of yellow, orange, or red.

plural of first principle

The set of basic statements on which a method, theory, or organisation is founded.

(military) A communication between the fire direction center (FDC) and an observer to direct artillery on a target.

(military, slang) The damage inflicted by a weapon on a vehicle that destroys its weapon systems, or substantially reduces its ability to deliver weapons accurately, but does not significantly affect its ability to move.

(military) An encampment designed to provide indirect artillery support to infantry troops operating beyond the normal range of fire support from their own base camps; a fire support base.

Alternative spelling of firsthand

Alternative spelling of fireproof

plural of fire retardant