Trier

1. n. That which tries or approves; a test.
2. n. One who tries; one who makes experiments; one who examines anything by a test or standard.
3. n. One who tries judicially.
4. n. A person appointed according to law to try challenges of jurors; a trior.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.