The science or state of fossils. / The state of being extremely antiquated in views and opinions. / A policy of reliance on fossil fuels.

The process of converting, or of being converted, into a fossil. / (figuratively, by extension) The process of becoming fixed, unchanging, and out of date.

(transitive) to make into a fossil / (intransitive) to become a fossil / (figuratively, by extension, intransitive) To become inflexible or outmoded.

simple past tense and past participle of fossilize

In a state of fossilization; preserved in rock / outmoded / (linguistics) having become a fossil: no longer productive

plural of fossil

(humorous or nonstandard) The quality of being a genuine fossil. / (humorous or nonstandard) Having qualities usually attributed to fossils, such as age combined with an absence of contemporary traits.

That which causes or undergoes fossilization.

plural of fossilizer

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.