| FOS | bearing or containing fossils |
|---|---|
| FOS | becoming inflexible or out of date |
| FOS | the process of fossilizing a plant or animal that existed in some earlier age |
| FOS | become mentally inflexible |
| FOS | convert to a fossil |
| FOS | set in a rigidly conventional pattern of behavior, habits, or beliefs |
| FOS | a specialist in paleontology |
| FOS | becoming inflexible or out of date |
| FOS | the process of fossilizing a plant or animal that existed in some earlier age |
| FOS | become mentally inflexible |
| FOS | convert to a fossil |
| FOS | set in a rigidly conventional pattern of behavior, habits, or beliefs |