A compound with, or derivative of, the imido group; specif., a compound of one or more acid radicals with the imido group, or with a monamine; hence, also, a derivative of ammonia, in which two atoms of hydrogen have been replaced by divalent basic or acid radicals; -- frequently used as a combining form; as, succinimide.

any of a class of organic compounds that contain the divalent radical -CONHCO-

In organic chemistry, imide is a functional group consisting of two carbonyl groups bound to a primary amine or ammonia. Imides are generally prepared directly from ammonia or the primary amine, and either carboxylic acid(s) or acid anhydrides. The structure of the imide moiety is as shown to the left.