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trapezia

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tra⋅pe⋅zi⋅um

  [truh-pee-zee-uhm]
Use trapezia in a Sentence
–noun, plural -zi⋅ums, -zi⋅a  [-zee-uh] .
1. Geometry.
a. (in Euclidean geometry) any rectilinear quadrilateral plane figure not a parallelogram.
b. a quadrilateral plane figure of which no two sides are parallel.
c. British. trapezoid (def. 1a).
2. Anatomy. a bone in the wrist that articulates with the metacarpal bone of the thumb.
Origin:
1545–55; < NL < Gk trapézion kind of quadrilateral, lit., small table, equiv. to trápez(a) table (shortening of *tetrapeza object having four feet, equiv. to tetra- four + péza foot, akin to poús, podós; see tetra-, foot ) + -ion dim. suffix

Related forms:
tra⋅pe⋅zi⋅al, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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tra·pe·zi·um   (trə-pē'zē-əm)   
n.   pl. tra·pe·zi·ums or tra·pe·zi·a (-zē-ə)

  1. A quadrilateral having no parallel sides.

  2. Chiefly British A trapezoid.

  3. A bone in the wrist at the base of the thumb.


[Late Latin trapezium, trapezoid, from Greek trapezion, diminutive of trapeza, table : tra-, four; see kwetwer- in Indo-European roots + peza, foot; see ped- in Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

trapezium 
1570, from L.L. trapezium, from Gk. trapezion "irregular quadrilateral," lit. "a little table," dim. of trapeza "table," from tra- "four" (see four) + peza "foot, edge," related to pous (see foot). Before 1546, L. editions of Euclid used the Arabic word helmariphe. As the name of a bone in the wrist, it is recorded from 1840.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: tra·pe·zi·um
Pronunciation: tr&-'pE-zE-&m, tra-
Function: noun
Inflected Form: plural tra·pe·zi·ums or tra·pe·zia /-zE-&/
: a bone in the distal row of the carpus at the base of the thumb called alsogreater multangular
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

trapezium tra·pe·zi·um (trə-pē'zē-əm)
n. pl. tra·pe·zi·ums or tra·pe·zi·a (-zē-ə)

  1. A quadrilateral having no parallel sides.

  2. A bone in the wrist at the base of the thumb, articulating with the first and second metacarpal, scaphoid, and trapezoid bones.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
trapezium   (trə-pē'zē-əm)  Pronunciation Key 
Plural trapeziums or trapezia
A four-sided plane figure having no parallel sides.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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