imid- combining form orimido- Etymology: International Scientific Vocabulary, from imide 1.now usually imido-: containing the bivalent groups . NH characteristic of imides united to or in one or two radicals of acid character < imidocarbonic acid HN . C(OH)2 > < imidodisulfuric acid HN(SO2OH)2 > < imidate > — distinguished from imin- 2.: imin- — now less used than formerly