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principal axis
(redirected from Principal axes)

    Also found in: Dictionary/thesaurus, Wikipedia 0.01 sec.
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)
optic axis


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To Infinity, and Beyond The arm's patented infinite rotation of principal axes makes the inspection of hard-to-reach areas possible.
Stamp of approval: the Swiss are known for their precision, so a shop ... by Modern Applications News
To get the RVSO, the principal axes of the single plumes boundaries are calculated, as the first principal axes meet in the VSO vicinity, the AVSO is the barycenter of these axes intersections.
Characterization of diesel spray images using the logarithmic image ... by Petit, Cecile; Jourlin, Michel; Reckers, Wolfgang / Image Analysis and Stereology
The principal axes each contain all four principal compass headings.
Compass curios by McManus, Christopher / Word Ways
 
 
 
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