formalin
/ˈfɔːrməlɪn/
noun
- A clear liquid made of formaldehyde gas dissolved in water, used to preserve dead animals or body parts for scientific study.
- The biology teacher stored the frog specimen in a jar of formalin.
- The smell of formalin filled the room where the dissection was taking place.
- Formalin is commonly used in medical labs to preserve tissue samples.