1560s, from Middle French rhomboide or directly from Late Latin rhomboides, from Greek rhomboeides "rhomboidal; a rhomboid;" see rhombus + -oid. Related: Rhomboidal. As an adjective from 1690s.
Rhodes
Rhodes scholar
rhodium
rhododendron
rhomb
rhomboid
rhombus
rhonchus
Rhone
rhotacism
rhubarb
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