Trier

Tri"er (?), n. [From Try.] 1. One who tries; one who makes experiments; one who examines anything by a test or standard. Boyle.

2. One who tries judicially.

3. (Law) A person appointed according to law to try challenges of jurors; a trior. Burrill.

4. That which tries or approves; a test. Shak.