Informant
Informant , noun
[Latin informans, -antis, present participle of informare. See Inform, transitive verb]
1.
One who, or that which, informs, animates, or vivifies. [Obsolete] — Glanvill
2.
One who imparts information or instruction.
3.
One who offers an accusation; an informer. See Informer. [Obsolete or Rare]
It was the last evidence of the kind; the informant
was hanged.