A fossil is the mineralized remains of a dead organism.

Fossil may also refer to:

• FOSSIL, a protocol for serial communications
• Fossil (file system), a file system used mainly by Plan 9 from Bell Labs
• Fossilized term, a type of bound morpheme in linguistics
• Interlanguage fossilization, a linguistic term
• Fossils (band), a rock band from Kolkata, India
• Fossil (novel), a book written by Hal Clement
• Fossiles, the 12th movement in the musical suite The Carnival of the Animals
• Fossil, Inc., a clothing/accessories company
• Fossil, Oregon, a city in the state of Oregon, United States
• A Pokémon trading card set (see List of Pokémon Trading Card Game sets)
• Fossil (software), a distributed version control system

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