Tri- *: pref. "Tri-" is a prefix meaning three or three times.
Triapertured: refers to the pollen grain typical of dicotyledons, having in principle three furrows or germinal pores and presenting a radial symmetry.
Trifid: split into three parts.
Trifoliate: said of a leaf whose petiole bears three leaflets.
Trigone: at three angles.
Triqueter: with a triangular section, like the stem of the triqueter garlic.
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