| fossil | the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil |
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| fossil | (informal) someone whose style is out of fashion |
| fossil | characteristic of a fossil |
| fossil | partly mineralized copal dug from the ground |
| fossil | fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content |
| fossil | a dark oil consisting mainly of hydrocarbons |
| fossil | bearing or containing fossils |
| fossil | becoming inflexible or out of date |
| fossil | the process of fossilizing a plant or animal that existed in some earlier age |
| fossil | become mentally inflexible |
| fossil | convert to a fossil |
| fossil | set in a rigidly conventional pattern of behavior, habits, or beliefs |