Definitions

1. adjective

relating to or derived from naphthalene, a white, crystalline, volatile, and highly flammable hydrocarbon used as a solvent and in the manufacture of dyes, plastics, and other chemicals.

“The naphthalic compounds in the factory caused the air to become hazardous to breathe.”

2. noun

a salt or ester of naphthalene, especially naphthalic acid.

“The chemist worked with various naphthalic compounds during the experiment.”