Parol evidence

Oral or verbal evidence; that which is given by word of mouth; the ordinary kind of evidence, given by witnesses in court. 3 Bl. Comm. 369.

In a particular sense, and with reference to contracts, deeds, wills, and other writings, parol evidence is the same as extraneous evidence or evidence aliunde. (See supra.)

— Partial evidence. that which goes to establish a detached fact, in a series tending to the fact in dispute. It may be received, subject to be rej'ected as incompetent, unless connected with the fact in dispute by proof of other facts; for example, on an issue of title to real property, evidence of the continued possession of a remote occupant is partial, for it is of a detached fact, which may or may not be afterwards connected with the fact in dispute. Code Civ. Proc. Cal. § 1834.
Defined under Evidence in Black's Law Dictionary.