a combining form used in the names of chemical compounds in which the −NH2 group united with an acid radical is present: amidocyanogen.
Also especially before a vowel, amid-.
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British Dictionary definitions for amido-
(in chemistry) indicating the presence of an amide group
Word Origin for amido-
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012