n., pl., -bus·es, or -bi (-bī).
An equilateral parallelogram.
[Late Latin, from Latin, flatfish, magician's circle, from Greek rhombos, rhombus.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
