1. Having the form of a trapezoid; trapezoid.
2. (Science: chemical) Tranpezohedral.
Origin: Cf. F. Trapezoidal.
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... in Silico Organisms at http://gcrg.ucsd.edu/organisms Householder QR algorithm Householder QR decomposition (A P = Q R) R is an upper-trapezoidal matrix, Q is an orthogonal matrix where Q T Q = I and P is a permutation matrix arising out of column exchanges during the construction ...
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