from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Living in fresh water but migrating to marine waters to breed. Used of fish.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. that lives in fresh water and breeds in the sea
  • adj. Of a fern in which the first veins in a frond segment are produced towards the base of the frond.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having the lowest inferior segment of a pinna nearer the rachis than the lowest superior one; -- said of a mode of branching in ferns, and opposed to anadromous.
  • adj. Living in fresh water, and going to the sea to spawn; -- opposed to anadromous, and said of the eel.

from The Century Dictionary and Cyclopedia

  • Running down; descending: applied to certain fishes which descend streams to the sea to spawn: opposed to anadromous.
  • In botany, having the first set of nerves (in each segment of a fern frond) given off on the basal side of the midrib, as in Osmunda. Compare anadromous .

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. migrating from fresh water to the sea to spawn


Sorry, no etymologies found.



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  • *Doffs his hat.*

    December 5, 2018

  • She probably got catfished.

    December 5, 2018

  • This is very good.

    December 5, 2018

  • It’s deep sea that makes a shad amorous

    But love misapplied is calamitous.

    How bad must she feel

    To fall for an eel

    Then learn that her lover’s catadromous.

    December 5, 2018