Pentamethylene
Pronunciation : Pen`ta*meth"yl*ene
Part of Speech : n.
Etymology : [Penta- + methylene.] (Chem.)
Definition : 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.
Source : Webster's Unabridged Dictionary, 1913