Definitions
from The Century Dictionary.
- noun A plane quadrilateral having its alternate sides equal but not parallel, two of them being crossed; the figure formed by the non-parallel sides and the diagonals of an isosceles trapezoid.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun
antiparallelogram
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
contra- + parallelogram
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