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catadromous (comparative more catadromous, superlative most catadromous)

  1. (of a migratory fish) that lives in fresh water and breeds in the sea
    • 2017, James C Scott, chapter 1, in Against the Grain, New Haven & London: Yale, →ISBN, page 53:
      Bird migration routes favor marshes and river valleys, as do, more obviously, the movement of anadromous salmon and, the mirror image, catadromous eels, to mention only two of the numerous migrating fish species.
  2. (botany) Of a fern in which the first veins in a frond segment are produced towards the base of the frond.



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