In the shape of a trapezoid, or having some faces which have one pair of parallel sides.

In a trapezoidal manner

(geometry, US) A (convex) quadrilateral with two (non-adjacent) parallel sides. / (geometry, Britain, Australia, New Zealand) A convex quadrilateral with no sides parallel.

plural of trapezoid

(mathematics) A method of finding an approximate value for a definite integral, based on dividing the area under the graph of the function into a series of strips, each of which is approximately a trapezoid, and summing the area of all the trapezoids to approximate the area.

(anatomy) One of the carpal bones of the wrist.

plural of isosceles trapezoid

A quadrilateral with two parallel sides and a separate pair of congruent sides which are not parallel.

plural of right trapezoid

(geometry) A trapezoid with two adjacent right angles