A Grammatical Dictionary of Botanical Latin

trapezialis,-e (adj.B), trapeziformis,-e (adj.B), trapezoideus,-a,-um (adj.A), trapizius,-a,-um (adj.A): trapeziform, “having four sides, those which are opposite not being parallel; scarcely different from ‘rhomboid’” (Lindley); i.e. asymmetrically four-sided or like a triangle with the tip cut off; “with four unequal sides” (Stearn 1996); ‘unsymmetrically 4-sided’ (Fernald 1950);

- cellulae sectione transversali triangulae vel trapezoideae vel rectangulares, cells in transverse section triangular or trapezoidal or rectangular.

- folia subopposita, anguste oblonga vel subtrapezoidea, leaves subopposite, narrowly oblong to weakly trapezoid.

- ovarium trapezio-obovoideum, e carpellis 3 liberis vertice exsculptis in stylos erectos crassos subcohaerentes attenuatis (B&H), the ovary trapezoid-[i.e. with 4 unequal sides] obovoid, [composed] from 3 free carpels pitted at the apex, narrowed into erect, thick, somewhat coherent styles.

rhomboideus,-a,-um (adj.A), 'somewhat like a rhombus,' longer than rhombic, elongate with parallel, oblique ends; rhombiformis,-e (adj.B): diamond- or lozenge-shaped.