Definition of methenyl in English:

methenyl

Pronunciation /ˈmɛθənɪl/ /ˈmɛθənʌɪl/

noun

Chemistry
  • A trivalent =CH— group; = methine .

Origin

Mid 19th century. From German Methenyl from Meth- + -enyl (suffix coined by Hofmann, in the same source, for a trivalent alkane group).