any of a class of carbides in which the carbon is present as a diatomic divalent ion (C22–). They are formally derivatives of acetylene
acetylide in American English
(əˈsetlˌaid)
noun
Chemistry
any compound derived from acetylene by the replacement of one or both of its hydrogen atoms by a metal, as silver acetylide, Ag2Cl2
Word origin
[acetyl + -ide]-ide is a suffix used in the names of chemical compounds. Other words that use the affix-ide include: amide, carbide, cerebroside, fluoride, glucoside