Bible Dictionaries
Pentamethylene

Webster's Dictionary

(n.) 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.

Bibliography Information
Webster, Noah. Entry for 'Pentamethylene'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/pentamethylene.html. 1828.