1. A goldsmith's tool used in making rings. Ainsworth.
2. A steel cylinder round which metal is drawn in the process of forming tubes. Tomlinson.
3. (Blacksmithing)
Defn: A tapering mandrel.
TRIBOMETER
Tri*bom"e*ter, n. Etym: [Gr. -meter: cf. F. tribomètre.]
Defn: An instrument to ascertain the degree of friction in rubbing surfaces. Brande & C.
TRIBRACH
Tri"brach, n. Etym: [L. tribrachys, Gr. Tri-) + (Gr. & L. Pros.)
Defn: A poetic foot of three short syllables, as, mèlì\'dcs.
TRIBRACTEATE
Tri*brac"te*ate, a. Etym: [Pref. tri- + bracteate.] (Bot.)
Defn: Having three bracts.