D defs.my
Entry 1 sense Webster, 1913

Trimethylene

· Tri·meth·yl·ene · IPA
01 n. A gaseous hydrocarbon, C3H6, isomeric with propylene and obtained from it indirectly. It is the base of a series of compounds analogous to …
  1. 1.
    A gaseous hydrocarbon, C3H6, isomeric with propylene and obtained from it indirectly. It is the base of a series of compounds analogous to the aromatic hydrocarbons.(Chem.)