zonal (zonal)

[ Frequently storm clouds appeared zonal - that is, alternate portions positively and negatively electrified. G. J. Symons, in Modern Meteorology, p. 163. 2. Of or pertaining to the rings, somites, or body-segments of an articulate or annulose animal; arthromeric; metameric: as, zonal symmetry, the serial homology or metameric symmetry of a segmented animal, as an arthropod or an annelid. See symmetry, 5 ( b ).— 3. In crystal., arranged in zones: as, the zonal structure of a mineral.-4. In bot., noting that view of a diatom in which the zone or suture of the valves is presented to the eye-the "front view" of some writers.-5. In hort., marked on the leaves with a zone or circle, as many pelargoniums, also called horseshoe geraniums. - Zonal harmonic. See harmonic. - Zonal stratum. See stratum zonale, under stratum. zonally (zō'nal-i), adv. In a zonal manner; in zones, or in the form of a zone. Crystals of the hyacinth variety of quartz... contain numerous inclusions of anhydrite arranged zonally . Amer. Nat ., ΧΧΙΙΙ. 814.