Source : Webster's Revised Unabridged Dictionary (1913)

Catanadromous \Cat"a*nad`ro*mous\, a. [Gr. kata` down + 'ana` up
   + dro`mos running, course.] (Zo["o]l.)
   Ascending and descending fresh streams from and to the sea,
   as the salmon; anadromous. [R.]