|  trapezium 
  
 
 1. a quadrilateral with no parallel sides
 • Ant:
 parallelogram
 • Regions:
 United States, United States of America, America, the States, US,
 U.S., USA, U.S.A.
 • Hypernyms:
 quadrilateral, quadrangle, tetragon
 2. the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals
 • Syn:
 trapezium bone, os trapezium
 • Hypernyms:
 carpal bone, carpal, wrist bone
 
 
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