rhomb

RHOMB, n. [L. rhombus; Gr from to turn or whirl round, to wander, to roam or rove; literally, a deviating square.]

In geometry, an oblique angled parallelogram, or a quadrilateral figure whose sides are equal and parallel, but the angles unequal, two of the angles being obtuse and two acute. It consists of two equal and right cones united at the base.