### Definition of Parallelogram

1. Noun. A quadrilateral whose opposite sides are both parallel and equal in length.

Specialized synonyms: Diamond, Rhomb, Rhombus, Rhomboid, Rectangle
Antonyms: Trapezium

### Definition of Parallelogram

1. n. A right-lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; -- sometimes restricted in popular usage to a rectangle, or quadrilateral figure which is longer than it is broad, and with right angles.

### Definition of Parallelogram

1. Noun. (geometry) A convex quadrilateral in which each pair of opposite edges are parallel and of equal length. ¹

¹ Source: wiktionary.com

1. [n -S]

### Medical Definition of Parallelogram

1. A right-lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; sometimes restricted in popular usage to a rectangle, or quadrilateral figure which is longer than it is broad, and with right angles. Parallelogram of velocities, forces, accelerations, momenta, etc. A parallelogram the diagonal of which represents the resultant of two velocities, forces, accelerations, momenta, etc, both in quantity and direction, when the velocities, forces, accelerations, momenta, etc, are represented in quantity and direction by the two adjacent sides of the parallelogram. Origin: Gr.; parallel + to write: cf. F. Parallelogramme. See Parallel, and -gram. Source: Websters Dictionary (01 Mar 1998)

### Parallelogram Pictures

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### Lexicographical Neighbors of Parallelogram

 parallelismparallelismsparallelisticparallelizabilityparallelizableparallelizationparallelizationsparallelizeparallelizedparallelizes parallelizingparallelledparallellessparallellingparallellyparallelogram (current term)parallelogram of forcesparallelogrammaticparallelogrammeparallelograms parallelograms of forcesparallelometerparallelopipedparallelopipedonparallelopipedonsparallelopipedsparallelsparallelwiseparallergicparalog

### Literary usage of Parallelogram

Below you will find example usage of this term as found in modern and/or classical literature:

1. The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago by Robert Simson, Euclid (1838)
"and complete the parallelogram DG; and, taking any straight line K make (12. 6.) as BC to CG, so K to L; and as DC to CE, so make (12. 6. ..."

2. An Introduction to Natural Philosophy: Designed as a Text-book, for the Use by Denison Olmsted (1854)
"In the case before us, the space described by a moving body is represented by a parallelogram, not because the space actually described has any resemblance ..."

3. The Thirteen Books of Euclid's Elements by Euclid, Johan Ludvig Heiberg (1908)
"In I. 44 it was a question of "applying to a given straight line (exactly, without 'excess' or 'defect') a parallelogram equal ..."

4. Elements of Geometry: Containing the First Six Books of Euclid, with a by John Playfair, William Wallace (1836)
"Let BC, CG be placed in a straight line; therefore DC and CE are also in a straight line"; complete the parallelogram DG; and, taking any straight line K, ..."

5. American Edition of the British Encyclopedia: Or, Dictionary of Arts and ...by William Nicholson by William Nicholson (1819)
"The parallelogram No. 1, is rectangular: No. 2 ii inclined, so as to hang over a space equal to the length ofits own base ; but the line A. B, ..."

6. A Treatise on Analytical Statics: With Numerous Examples by Edward John Routh (1896)
"parallelogram of Force*. To find the resultant of two forces acting at a given ... Let us now construct a parallelogram having OA, OB for two adjacent sides ..."

7. Theory of Functions of a Complex Variable by Andrew Russell Forsyth (1893)
"It is desirable to have the parallelogram, in which a doubly- periodic ... If in the parallelogram (supposed, for convenience, to have the origin for an ..."