trapezoid

Etymology

From Ancient Greek τραπέζιον (trapézion, “irregular quadrilateral”, literally “a little table”) + -oid (“resembling”).

noun

  1. (geometry, US, Canada) A (convex) quadrilateral with two (non-adjacent) parallel sides.
  2. (geometry, Britain, Australia, New Zealand) A convex quadrilateral with no sides parallel.
  3. (anatomy) The trapezoid bone of the wrist.

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