ANADROMOUS
anadromous
(adjective) migrating from the sea to fresh water to spawn
Source: WordNet® 3.1
Etymology
Adjective
anadromous (not comparable)
(of a migratory fish) That lives in the sea and breeds in fresh water.
(botany) Of a fern in which the first veins in a frond segment are produced towards the apex of the frond.
Antonyms
• (botany): catadromous
Source: Wiktionary
A*nad"ro*mous, a. Etym: [Gr.
1. (Zoöl.)
Definition: Ascending rivers from the sea, at certain seasons, for
breeding, as the salmon, shad, etc.
2. (Bot.)
Definition: 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 Unabridged Dictionary 1913 Edition