TRIENS
Tri"ens, n. Etym: [L., from tres, tria, three.] (Rom. Antiq.)

Defn: A Roman copper coin, equal to one third of the as. See 3d As, 2.

TRIER
Tri"er, n. Etym: [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)

Defn: A person appointed according to law to try challenges of jurors; a trior. Burrill.

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

TRIERARCH Tri"er*arch, n. Etym: [L. trierarchus, Gr. (Gr. Antiq.) (a) The commander of a trireme. (b) At Athens, one who (singly, or jointly with other citizens) had to fit out a trireme for the public service.

TRIERARCHY
Tri"er*arch`y, n.; pl. Trierarchises. Etym: [ Gr.