Definition of methenyl in English:
methenyl
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).
Pronunciation
methenyl
/ˈmɛθənʌɪl//ˈmɛθənɪl/