/dek'euh huy'droh naf"theuh leen', -nap"-/ , n. Chem.
a colorless, aromatic liquid, C 10 H 18 , insoluble in water and soluble in alcohol and ether: used as a solvent for oils, fats, etc., in cleaning fluids, lubricants, etc.
[ 1875-80; DECA- + HYDRO- 2 + NAPHTHALENE ]