What is Viva Voce?

Legal Definition
Living voice; verbally. It is said a witness delivers his evidence viva voce, when he does so in open court; the term is opposed to deposition. It is sometimes opposed to ballot; as, the people vote by ballot, but their representatives in the legislature, vote viva voce.
-- Bouviers Law Dictionary
Legal Definition
Lat With the living voice; by word of mouth. As-applied to the examination of witnesses, this phrase is equivalent to "orally." It is used in contradistinction to evidence on affidavits or depositions. As descriptive of a species of voting, it signifies voting by speech or outcry, as distinguished from voting by a written or printed ballot.
-- Black's Law Dictionary
Legal Definition
Orally; by acclamation.
-- Ballentine's Law Dictionary