-yl·i·dyne
\ˈīləˌdīn, _ə̇l-\ noun suffix
(-s)
Etymology: International Scientific Vocabulary -yl + -idyne
: trivalent radical derived especially from a saturated hydrocarbon by removal of three hydrogen atoms from the same carbon atom
 < ethylidyne CH₃C≡ >
— in the system adopted by the International Union of Pure and Applied Chemistry