'Rhombus' definitions:

Definition of 'rhombus'

From: WordNet
noun
A parallelogram with four equal sides; an oblique-angled equilateral parallelogram [syn: rhombus, rhomb, diamond]

Definition of 'Rhombus'

From: GCIDE
  • Rhombus \Rhom"bus\, n. [L.] Same as Rhomb, 1. [1913 Webster]