Noun: parallelogram ,per-u'le-lu,gram [N. Amer], ,pa-ru'le-lu,gram [Brit]
- A quadrilateral whose opposite sides are both parallel and equal in length
"the shear changed the rectangle into a parallelogram"
Derived forms: parallelograms
Type of: quadrangle, quadrilateral, tetragon
Antonym: trapezium [N. Amer]
Encyclopedia: Parallelogram