tangent arc


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tangent arc

[′tan·jənt ¦ärk]
(meteorology)
Generic name for several types of halo arcs that form as loci tangent to other halos; the halo of 22° occasionally exhibits the horizontal and vertical tangent arcs, and the halo of 46° exhibits the infralateral tangent arcs and the supralateral tangent arcs.
References in periodicals archive ?
Methods for tool entry into stock include plunge, ramp, helical, arc, tangent arc, normal to surface, and tangent to surface.