amido-

1.
a combining form used in the names of chemical compounds in which the −NH 2 group united with an acid radical is present:
amidocyanogen.
2.
(erroneously) amino-.
Also, especially before a vowel, amid-.
Origin
British Dictionary definitions for amido-

amido-

combining form
1.
(in chemistry) indicating the presence of an amide group
Word Origin
from amide
amido- in Medicine

amido- pref.
Having a NH2 radical as well as a CO radical in a compound: amidohydrolase.