Definition of "rhomboides"

they would request us to endure still the rustling of their silken cassocks, and that we would burst our Midriffs, rather than laugh to see them under sail in all their lawn and sarcenet, their shrouds and tackle, with a Geometrical Rhomboides upon their heads

1641 May, John Milton, Of Reformation Touching Church-Discipline in England: And the Cavvses that hitherto have Hindred it; republished as Will Taliaferro Hale, editor, Of Reformation Touching Church-Discipline in England (Yale Studies in English; LIV), New Haven, Conn.: Yale University Press, 1916

In the firſt Courſe there was a Shoulder of Mutton, cut into an Æquilateral Triangle, a Piece of Beef into a Rhomboides, and a Pudding into a Cycloid.

1726 October 28, [Jonathan Swift], “The Humours and Dispositions of the Laputians Described. […]”, in Travels into Several Remote Nations of the World. […] [Gulliver’s Travels], volume II, London: […] Benj[amin] Motte, […], part III (A Voyage to Laputa, Balnibarbi, Glubbdubdribb, Luggnagg, and Japan), page 20

Let the Square A, and the Rhomboides B, Fig. 47. serve for an Example of this, which I suppose at the Height D, equal to E, the same with d the Height of the Square A […]

1763, Noël Antoine Pluche, Spectacle de la Nature: Or, Nature Display'd, page 169