Tricuspidate, three-pointed.
Tridentate, three-toothed.
Triennial, lasting for three years.
Trifarious, in three vertical rows; looking three ways.
Trifid, three-cleft, [56].
Trifoliate, three-leaved. Trifoliolate, of three leaflets.
Trifurcate, three-forked.
Trigonous, three-angled, or triangular.
Trigynous, with three pistils or styles, [116].
Trijugate, in three pairs (jugi).