Category:Pentamethylene

Pen`ta*meth"yl*ene, n. Etym: [penta- + methylene.] (chem.)

Defn: a hypothetical hydrocarbon, c5h10, metameric with the amylenes, And the nucleus of a large number of derivatives; -- so named because Regarded as composed of five methylene residues. Cf. Trimethylene, And tetramethylene.