Which term describes a person required to give testimonial evidence in a trial?

The term that describes a person required to give testimonial evidence in a trial is "witness." A witness plays a crucial role in legal proceedings, as they provide firsthand accounts or expert opinions that contribute to establishing the facts of the case. Their testimony can come from personal knowledge of events or circumstances surrounding the dispute or from specialized knowledge relevant to the case at hand.

In contrast, individuals such as defendants and plaintiffs have distinct roles in a trial. The defendant is the person being accused or sued, while the plaintiff is the one bringing the lawsuit or charge against the defendant. Jurors, on the other hand, are members of the jury responsible for evaluating the evidence presented and rendering a verdict. Unlike witnesses, jurors do not provide testimonial evidence; instead, they rely on the testimony and evidence provided by witnesses to make their decisions.