RHOMB
\ɹˈɒm], \ɹˈɒm], \ɹ_ˈɒ_m]\
Definitions of RHOMB
 2010  New Age Dictionary Database
 1913  Webster's Revised Unabridged Dictionary
 1919  The Winston Simplified Dictionary
 1919  The Concise Standard Dictionary of the English Language
 1894  The Clarendon dictionary
 1914  Nuttall's Standard dictionary of the English language
 1874  Etymological and pronouncing dictionary of the English language
 1871  The Cabinet Dictionary of the English Language
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An equilateral parallelogram, or quadrilateral figure whose sides are equal and the opposite sides parallel. The angles may be unequal, two being obtuse and two acute, as in the cut, or the angles may be equal, in which case it is usually called a square.

A rhombohedron.
By Oddity Software

An equilateral parallelogram, or quadrilateral figure whose sides are equal and the opposite sides parallel. The angles may be unequal, two being obtuse and two acute, as in the cut, or the angles may be equal, in which case it is usually called a square.

A rhombohedron.
By Noah Webster.
By William Hand Browne, Samuel Stehman Haldeman
By Nuttall, P.Austin.
By Stormonth, James, Phelp, P. H.