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principal axis |
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principal axis [′prin·sə·pəl ′ak·səs] (crystallography) The longest axis in a crystal. (engineering acoustics) A reference direction for angular coordinates used in describing the directional characteristics of a transducer; it is usually an axis of structural symmetry or the direction of maximum response. (mathematics) One of a set of perpendicular axes such that a quadratic function can be written as a sum of squares of coordinates referred to these axes. For a conic, a straight line that passes through the midpoints of all the chords perpendicular to it. For a quadric surface, the intersection of two principal planes. (mechanics) One of three perpendicular axes in a rigid body such that the products of inertia about any two of them vanish. (optics) How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The competition-winning scheme consists of several distinct elements, the largest of which is a temporary exhibition gallery, orientated parallel to the old building's principal axis, but separated from the nineteenth-century structure by a small garden. The main pavilion on two levels steps down the site along the principal axis to a paved courtyard and green lawn bounded by trees. |
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