Defn: Containing three letters or characters, or three sets of letters or characters.
TRIGRAMMIC
Tri*gram"mic, a. Etym: [Gr. Trigrammatic.]
Defn: Same as Trigrammatic.
TRIGRAPH
Tri"graph, n. Etym: [Pref. tri- + -graph.]
Defn: Three letters united in pronunciation so as to have but one sound, or to form but one syllable, as -ieu in adieu; a triphthong.
TRIGYN
Tri"gyn, n. (Bot.)
Defn: Any one of the Trigynia.
TRIGYNIA
Tri*gyn"i*a, n. pl. Etym: [NL., Gr. Tri-) + (Bot.)
Defn: A Linnæan order of plants having three pistils or styles.
TRIGYNIAN; TRIGYNOUS
Tri*gyn"i*an, Trig"y*nous, a. (Bot.)