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trapezium

Definitions of trapezium
  1. noun
    a quadrilateral with no parallel sides
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    Antonyms:
    parallelogram
    a quadrilateral whose opposite sides are both parallel and equal in length
    type of:
    quadrangle, quadrilateral, tetragon
    a four-sided polygon
  2. noun
    the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals
    synonyms: os trapezium, trapezium bone
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    type of:
    carpal, carpal bone, wrist bone
    any of the eight small bones of the wrist of primates
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