Emily Dickinson Lexicon

RHOMB, n. [Fr. rhombe; L. rhombus; Gr. ῥομβος, from ῥεμβω, 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 similar isosceles triangles united at the base. – Encyc. Harris.