Anadromous

1. a. Tending upwards; — said of terns in which the lowest secondary segments are on the upper side of the branch of the central stem.
2. a. Ascending rivers from the sea, at certain seasons, for breeding, as the salmon, shad, etc.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.