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The Collaborative International Dictionary

Anadromous \A*nad"ro*mous\, a. [Gr. ? running upward; ? + ? a running, ? to run.]

  1. (Zo["o]l.) Ascending rivers from the sea, at certain seasons, for breeding, as the salmon, shad, etc.

  2. (Bot.) Tending upwards; -- said of terns in which the lowest secondary segments are on the upper side of the branch of the central stem.
    --D. C. Eaton. [1913 Webster] ||

Douglas Harper's Etymology Dictionary

of fish, "ascending a river to spawn" (as salmon do), 1753, from Latinized form of Greek anadromos "running upward," from ana "up, back" (see ana-) + dramein "to run" (see dromedary).


a. 1 (context of a migratory fish English) That lives in the sea and breeds in fresh water. 2 (context botany English) Of a fern in which the first veins in a frond segment are produced towards the apex of the frond.


adj. migrating from the sea to fresh water to spawn [ant: catadromous, diadromous]

Usage examples of "anadromous".

One thing habitat designers had not figured out was a way to grow anadromous fish in a space colony.