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Vinony

zonation

noun

  1. appearing to have zones of color/texture/etc.
L678374 on Wikidata ↗

Wiktionary

noun

Etymology: From zone + -ation.

  1. An arrangement or distribution of things into zones.
  2. The formation of a hollow sphere by the nucleus in metaphase, with a film of granulated protoplasm that marks the boundary of the compound oosphere in Cystopus bliti.