Hypertext Webster Gateway: "zonal"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Zonal \Zon"al\, a. [L. zonalis.]
Of or pertaining to a zone; having the form of a zone or
zones.
{Zonal equation} (Crystallog.), the mathematical relation
which belongs to all the planes of a zone, and expresses
their common position with reference to the axes.
{Zonal structure} (Crystallog.), a structure characterized by
the arrangements of color, inclusions, etc., of a crystal
in parallel or concentric layers, which usually follow the
outline of the crystal, and mark the changes that have
taken place during its growth.
{Zonal symmetry}. (Biol.) See the Note under {Symmetry}.
From WordNet (r) 1.7 (wn)
zonal
adj 1: relating to or of the nature of a zone; "the zonal frontier"
[syn: {zonary}]
2: associated with or divided into zones; "a zonal pattern of
cell structure"; "zonal division" [ant: {azonal}]
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