Definition of polymethylene in English:

polymethylene

noun

Chemistry
  • Originally: any of the series of saturated cyclic hydrocarbons with the formula (CH₂)ₙ; = "naphthene". Later: a compound, group, or polymeric structure which consists of or contains a chain of methylene groups, —(CH₂)ₙ—.

Origin

Late 19th century; earliest use found in Journal of the Chemical Society. From poly- + methylene.

Pronunciation

polymethylene

/ˌpɒlɪˈmɛθɪliːn/