trapezoidal

from WordNet (r) 3.0 (2006)

trapezoidal
    adj 1: resembling a trapezoid

from The Collaborative International Dictionary of English v.0.48

Trapezoidal \Trap`e*zoid"al\, a. [Cf. F. trap['e]zo["i]dal.]
   [1913 Webster]
   1. Having the form of a trapezoid; trapezoid.
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   2. (Min.) Trapezohedral.
      [1913 Webster]