|1.||a. a relic, remnant, or representation of an organism that existed in a past geological age, or of the activity of such an organism, occurring in the form of mineralized bones, shells, etc, as casts, impressions, and moulds, and as frozen perfectly preserved organisms|
|b. (as modifier): fossil insects|
|a. a person, idea, thing, etc, that is outdated or incapable of change|
|b. (as modifier): fossil politicians|
|3.||linguistics a form once current but now appearing only in one or two special contexts, as for example stead, which is found now only in instead (of) and in phrases like in his stead|
|4.||obsolete any rock or mineral dug out of the earth|
|[C17: from Latin fossilis dug up, from fodere to dig]|
fossil [%PREMIUM_LINK%] (fŏs'əl) Pronunciation Key |
The remains or imprint of an organism from a previous geologic time. A fossil can consist of the preserved tissues of an organism, as when encased in amber, ice, or pitch, or more commonly of the hardened relic of such tissues, as when organic matter is replaced by dissolved minerals. Hardened fossils are often found in layers of sedimentary rock and along the beds of rivers that flow through them. See also index fossil, microfossil, trace fossil.
The evidence in rock of the presence of a plant or an animal from an earlier geological period. Fossils are formed when minerals in groundwater replace materials in bones and tissue, creating a replica in stone of the original organism or of their tracks. The study of fossils is the domain of paleontology. The oldest fossils (of bacteria) are 3.8 billion years old.
Note: The term is used figuratively to refer to a person with very old-fashioned or outmoded viewpoints: “That old fossil thinks that men should wear suits at the theater!”