The Collaborative International Dictionary
Longilateral
Longilateral \Lon`gi*lat"er*al\, a. [L. longus long + lateralis lateral, fr. latus side.] Having long sides; especially, having the form of a long parallelogram.
Nineveh . . . was of a longilateral figure, ninety-five
furlongs broad, and a hundred and fifty long.
--Sir T.
Browne.
Wiktionary
longilateral
a. Having long sides, or, especially, the form of a long parallelogram.