b. Botany. In combination with other adjectives of form, as triangular-cordate, triangular-crenate, triangular-dentate, triangular-hastate, triangular-ovate, triangular-rhomboid, triangular-subulate.
ΚΠ
1870 J. D. HookerStudent's Flora Brit. Islands 264 Scrophularia nodosa..leaves ovate or triangular-cordate.
1887 W. PhillipsMan. Brit. Discomycetes 99 Margin triangular-dentate.