Cre-dĕn'tial1, a.
a. [It. credenziale; from L. Lat. credentia. See CREDENCE.] Giving a title to credit. “Their credential letters on both sides.” Camden.
2 entries under this word
Credential
Cre-dĕn’tial2, n.
(-dĕn’shal), n. 1. That which gives credit; that which gives a title or claim to confidence.
For this great dominion here Which over other beasts we claim, Reason our best credential doth appear. Buckinghamshire.
Sense 2. (pl.) Testimonials or certificates showing that a person is entitled to credit, or has authority or official powers; as the letters of commendation and power given by a government to an ambassador or envoy, which give him credit at a foreign court.
The committee of estates excepted against the credentials of the commissioners. Whitlock.
To produce his credentials that he is indeed God’s ambassador. Trench.