EXAMPLES | WORD ORIGIN noun . Geometry a quadrilateral plane figure having two parallel and two nonparallel sides. . British trapezium. (def 1b) . Anatomy a bone in the wrist that articulates with the metacarpal bone of the forefinger. adjective Also trap·e·zoi·dal. . Geometry of, relating to, or having the form of a trapezoid. Origin of trapezoid 1695–1705;
New Latin trapezoīdēs
Late Greek trapezoeidḗs
-oid Related forms post·trap·e·zoid, adjective sub·trap·e·zoid, adjective sub·trap·e·zoi·dal, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for trapezoid Historical Examples of trapezoid
An interesting variation of the ordinary proof is made by placing a
trapezoid T', congruent to T, in the position here shown.
The term "isosceles
trapezoid" is used to mean a trapezoid with two opposite sides equal, but not parallel.
The area of a
trapezoid is equal to half the sum of its bases multiplied by the altitude.
In the first drawer I keep the four plain wooden squares and two frames, one containing a rhomboid, and the other a
trapezoid and the os magnum of the carpus are united, while in Choloepus they are perfectly distinct bones. British Dictionary definitions for trapezoid noun a quadrilateral having neither pair of sides parallel Also called: (Brit, Austral., NZ, and South African) trapezium US and Canadian a quadrilateral having two parallel sides of unequal length a small bone of the wrist near the base of the index finger Word Origin for trapezoid
C18: from New Latin
trapezoidēs, from Late Greek trapezoeidēs trapezium-shaped, from trapeza table
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for trapezoid n.
1706, "a trapezium," from Modern Latin
trapezoides, from Late Greek trapezoeides (Proclus), special use by Euclid of Greek trapezoeides "trapezium-shaped," from trapeza, literally "table" (see trapezium), + -oeides "shaped" (see -oid). Technically, a quadrilateral figure with no two sides parallel. But in English since c.1800, often confused with trapezium in its sense of "a quadrilateral figure having only two sides parallel."
Online Etymology Dictionary, © 2010 Douglas Harper
n. A quadrilateral having two parallel sides. A small bone in the wrist that is situated near the base of the index finger and that articulates with the second metacarpal, trapezium, capitate, and scaphoid bones. Related forms trap null ′e•zoid′ adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
A four-sided plane figure having two parallel sides.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
trapezoid [( trap-uh-zoyd)]
polygon in which two sides are parallel and two are not.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.