(linguistics) A word that is broadly obsolete but remains in current use because it is contained within an idiom that is still in use.

plural of fossil word

plural of body fossil

A fossil formed when sediment fills the inside or covers the outside of a dead organism and the organism's remains do not persist, leaving just the shape and texture of the rock to indicate the organic material that was there.

plural of mold fossil

(derogatory, slang) One who uses fossil fuels without concern for their environmental impact.

plural of fossil fool

A fossil containing part of an organism's body, as opposed to a trace fossil.

Damascus steel created from scrap damascus pieces.

Water that has remained in an aquifer for a long timespan, usually thousands or millions of years.