n. An alicyclic hydrocarbon, C5H10; a volatile inflammable liquid, sometimes used as a solvent.
The Century Dictionary and Cyclopedia
n. A synthetic cyclic hydrocarbon, C5H10. It is an oil which boils at 50° C. Also called pentamethylene and R-pentene.
Word Usage
"And the refrigerator will use cyclopentane as the insulation foam-blowing agent instead of the commonly used, higher-emitting HFC foam-blowing agent."