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1. The horizontal angular distance from a reference direction, usually the northern point of the horizon, to the point where a vertical circle through a celestial body intersects the horizon, usually measured clockwise. Sometimes the southern point is used as the reference direction, and the measurement is made clockwise through 360°.
2. The horizontal angle of an observer's bearing, measured clockwise from a reference direction such as true north.
3. The horizontal angle of a projectile's motion, measured relative to a reference direction such as true north.

[Middle English azimut, from Old French, from Arabic as-sumūt, pl. of as-samt, the way, compass bearing : al-, the + samt, way (from Latin sēmita, path; see mei- in Indo-European roots).]

az′i·muth′al (-mŭth′əl) adj.
az′i·muth′al·ly adv.
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Adj.1.azimuthal - of or relating to or in azimuth
References in periodicals archive ?
4a,b) propagated azimuthally along the radial gradient in vorticity (Fig.
The scattering intensity of these peaks was azimuthally independent, indicating that the material is unorientated originally.
This feature of [v.sub.0] can be ascribed to the fact that the azimuthally integrated magnitude of transverse flow increases with increasing centrality of the collisions.
Du, "Wavefield forward modelling with the pseudo-spectral method in viscoelastic and azimuthally anisotropic media," ACTA Physica Sinica, vol.
Pech, "Geometrical spreading of P-waves in horizontally layered, azimuthally anisotropic media," Geophysics, vol.
Further, as described in detail in [23], the mesh for CMC computations is two-dimensional where the cells have been collapsed azimuthally into a single vertical plane.
Although center mounted, the GDI injector spray pattern is not azimuthally symmetric to the injector.
* Region IV: the wall jet region where the velocity is primarily azimuthal and where the boundary layer whose thickness increases azimuthally, is subject to virtually zero pressure gradients (Fig.
In previous works, the high frequency azimuthally symmetrical and nonsymmetrical eigenmodes in a REB with ion-channel guiding have been analyzed by Rouhani et al.
The beam-steering capabilities of the lens are experimentally verified, demonstrating that it can azimuthally scan a region within [+ or -]30[degrees] with gains of at least 18 dBi over a bandwidth from 57 to 66 GHz.
Heisterkamp, "Molecular orientation sensitive second harmonic microscopy by radially and azimuthally polarized light," Biomedical Optics Express, vol.
According to the coupled-mode theory (Section 2.1), and using a Matlab[C] simulation [46-48], under the conditions previously described for the LPFGs, the coupling was found to occur between the [LP.sub.01] core mode and the [LP.sub.13] azimuthally asymmetric cladding mode (m = 3).