trapezoid


Concise Oxford English Dictionary © 2008 Oxford University Press:
trapezoid /ˈtrapɪzɔɪd, trəˈpiːzɔɪd/
noun Geometry, Brit. a quadrilateral with no sides parallel.

N. Amer. a quadrilateral with one pair of sides parallel.

– derivatives
trapezoidal adjective.
– origin C18: from mod. L. trapezoides, from late Gk trapezoeidēs, from trapeza (see trapezium).
'trapezoid' also found in these Oxford entries:

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