characteristic directions

characteristic directions

[‚kar·ik·tə′ris·tik də′rek·shənz]
(mathematics)
For a point P on a surface S, the pair of conjugate directions which are symmetric with respect to the directions of the lines of curvature on S through P.
References in periodicals archive ?
The samples are cut out of composite plates in the characteristic directions dictated by the textile structure: (1) test in the direction of one of the yarn systems of the textile (warp/weft for woven fabrics; braiding/inlay yarns for braids); (2) test in the direction transversal or bias to the direction of the yarn systems in the textile (bias for woven fabrics, perpendicular to the production direction for braids).

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