TRAPEZOID

trapezoid, trapezoid bone, os trapezoideum

(noun) the wrist bone between the trapezium and the capitate bones

trapezoid

(noun) a quadrilateral with two parallel sides

Source: WordNet® 3.1

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Etymology

Noun

trapezoid (plural trapezoids)

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

(geometry, British, AU, NZ) A convex quadrilateral with no sides parallel and no equal sides.

(anatomy) The trapezoid bone of the wrist.

Synonyms

• (geometry, convex quadrilateral with two non-adjacent parallel sides): (British) trapezium

• (geometry, convex quadrilateral with no parallel sides): irregular quadrilateral, (US) trapezium

Source: Wiktionary

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Trap"e*zoid, n. Etym: [Gr. trapézoïde. See Trapezium.]

1. (Geom.)

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

2. (Anat.)

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

Trap"e*zoid, a.

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

2. (Anat.)

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

Source: Webster’s Unabridged Dictionary 1913 Edition

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