Defn: The office duty of a trierarch.

TRIETERICAL
Tri`e*ter"ic*al, a. Etym: [L. trietericus, Gr. Tri-.) +

Defn: Kept or occurring once in three years; triennial. [R.] J.
Gregory.

TRIETERICS
Tri`e*ter"ics, n. pl. Etym: [L. trieterica, pl., fr. Gr. (Class.
Antiq.)

Defn: Festival games celebrated once in three years. [R.] May.

TRIETHYLAMINE
Tri*eth`yl*am"ine, n. Etym: [Pref. tri- + ethylamine.] (Chem.)

Defn: A tertiary amine analogous to trimethylamine.

TRIFACIAL
Tri*fa"cial, a. Etym: [Pref. tri- + facial.] (Anat.)

Defn: See Trigeminal.

TRIFALLOW
Tri"fal`low, v. t. [imp. & p. p. Trifallowed; p. pr. & vb. n.
Trifallowing.] Etym: [Pref. tri- + fallow. Cf. Thryfallow.]