Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of tetramethylene is as below...

Tetramethylene :: Tetramethylene (n.) A hypothetical hydrocarbon, C4H8, analogous to trimethylene, and regarded as the base of well-known series or derivatives..

Pentamethylene :: Pentamethylene (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..

Tetramethylene :: Tetramethylene (n.) Sometimes, an isomeric radical used to designate certain compounds which are really related to butylene..

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