7 letters · 14 points in Scrabble
noun a parallelogram with four equal sides; an oblique-angled equilateral parallelogram
originLearned borrowing from Latin rhombus, from Ancient Greek ῥόμβος (rhómbos, “rhombus, spinning top”). Doublet of rhomb and rhumb.
Etymology from Wiktionary, CC BY-SA 3.0