Transverse incision: = transverse sulci.
Transverse sulci: the transverse grooves of pronotum in many Orthoptera.
Transverse suture: in Diptera, a transverse groove extending inward from the root of wing and obsolete in the middle of dorsum.
Trapeziform: in the form or shape of a trapezium.
Trapezium: a four-sided figure in which no two sides are parallel. {Scanner's comment: sic This is presumably an error in editing the original text. A trapezium has two sides parallel. Compare next item.}
Trapezoid -al: a four-sided plane of which two sides are parallel and two are not.
Tri-: three; a combining form.
Triangle: in Odonata: a small, triangular cell at the junction of cubitus with cubitus 1: a similar cell adjoining it basally is the internal triangle discoidal triangle: cardinal cell; q.v.
Tri-articulate: composed of three joints or articles.
Tribe: a term of classification less than a subfamily: opinionative and ending in ini: but this is not universally adhered to.