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Trapezoid vs. Trapezium: What's the Difference?

Trapezoid and Trapezium Definitions

Trapezoid

A quadrilateral having two parallel sides.

Trapezium

A quadrilateral having no parallel sides.

Trapezoid

Chiefly British A trapezium.

Trapezium

Chiefly British A trapezoid.

Trapezoid

(Anatomy) A small bone in the wrist, situated near the base of the index finger.
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Trapezium

(Anatomy)A bone in the wrist at the base of the thumb.

Trapezoid

(Sports) An area in the shape of a trapezoid marked behind the goal line and the goal in ice hockey, where the goalie is allowed to play the puck.

Trapezium

A quadrilateral with two sides parallel.

Trapezoid

A (convex) quadrilateral with two (non-adjacent) parallel sides.

Trapezium

(restrictively) A quadrilateral with two sides parallel and two sides non-parallel.
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Trapezoid

A convex quadrilateral with no sides parallel.

Trapezium

A four-sided polygon with no parallel sides and no sides equal; a simple convex irregular quadrilateral.

Trapezoid

(anatomy) The trapezoid bone of the wrist.

Trapezium

(anatomy) The trapezium bone of the wrist.

Trapezoid

A plane four-sided figure, having two sides parallel to each other.

Trapezium

A region on the ventral side of the brain, either just back of the pons Varolii, or, as in man, covered by the posterior extension of its transverse fibers.

Trapezoid

A bone of the carpus at the base of the second metacarpal, or index finger.

Trapezium

A plane figure bounded by four right lines, of which no two are parallel.

Trapezoid

Having the form of a trapezoid; trapezoidal; as, the trapezoid ligament which connects the coracoid process and the clavicle.

Trapezium

A bone of the carpus at the base of the first metacarpal, or thumb.

Trapezoid

Of or pertaining to the trapezoid ligament; as, the trapezoid line.

Trapezium

A quadrilateral with no parallel sides

Trapezoid

A quadrilateral with two parallel sides

Trapezium

A multiple star in the constellation of Orion

Trapezoid

The wrist bone between the trapezium and the capitate bones

Trapezium

The wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals

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