| 释义 |
principal normal indicatrix principal normal indicatrix[¦prin·sə·pəl ‚nȯr·məl in′dik·ə‚triks] (mathematics) For a space curve, all the end points of those radii of a unit sphere that are parallel to the positive directions of the principal normals to the curve. Also known as spherical indicatrix of the principal normal. |