amid-
combining form of amide, sometimes used instead of amido- before vowels; as in amidacetic acid, amidazobenzene, etc.
| 1873 Watts Fownes' Chem. 681 Amidacetic Acid is formed by the action of ammonia on bromacetic or chloracetic acid. 1877 Ibid. II. 467 Amidazobenzene..forms the chief constituent of commercial aniline yellow. |