Credible

[Lat. credibilis, from credere, to believe, or trust.] In the law of evidence. To be believed; entitled to credit; worthy of belief. A term applied to a witness after his evidence is given. This term is never used as synonymous to competent. When applied to testimony, it presupposes the evidence given.

Lord Mansfield, 1 Burr, 414, 417.

After the competence of a witness is allowed, the consideration of his credibility arises, and not before. Id. ibid.

3 Bl. Com. 369.