(n) an exemption that displaces the privilege against self-incrimination; neither compelled testimony or any fruits of it can be used against the witness who therefore can no longer fear self-incrimination, Syn. testimonial immunity
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n. [ Cf. OF. testimoniale, LL. testimonialis, L. testimoniales (sc. litterae). See Testimonial, a. ] 1. A writing or certificate which bears testimony in favor of one's character, good conduct, ability, etc., or of the value of a thing. [ 1913 Webster ]
2. Something, as money or plate, presented to a preson as a token of respect, or of obligation for services rendered. [ 1913 Webster ]