anadrom

a. [ Gr. &unr_; running upward; &unr_; + &unr_; a running, &unr_; to run. ] 1. (Zool.) Ascending rivers from the sea, at certain seasons, for breeding, as the salmon, shad, etc. [ 1913 Webster ]

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 ]