Compurgator

• (n.) One who bears testimony or swears to the veracity or innocence of another. See Purgation; also Wager of law, under Wager.
Found on http://thinkexist.com/dictionary/meaning/compurgator/

Compurgator

Com'pur¬∑ga`tor noun [ Late Latin ] One who bears testimony or swears to the veracity or innocence of another. See Purgation ; also Wager of law , under Wager . « All they who know me . . . will say they have reason in this matter to be my compurgators . Chillingwo...
Found on http://www.encyclo.co.uk/webster/C/125

Compurgator

Formerly, when a person was accused of a crime or sued in a civil action, he might purge himself upon oath of the accusation made against him whenever the proof was not the most clear and positive; and if upon his oath he declared himself innocent, he was absolved.
Found on http://www.lectlaw.com/def/c265.htm
No exact match found