anadromous

1. (Zoöl.) 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.

Source: Webster's Revised Unabridged Dictionary (1913), United States public domain. See methodology for full licensing detail. Word validity for game play may differ from any official game dictionary.