Definitions

1. noun

a solution of formaldehyde in water, used as a preservative for biological specimens and for embalming

“The laboratory used formalin to preserve the specimen for further study.”

2. verb

to preserve or treat with formalin, especially in order to prevent decay

“The museum conservators formalined the ancient artifacts to prevent damage.”

3. adjective

containing or treated with formalin

“The formalin-soaked cloth was used to preserve the delicate painting.”