Catadromous

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Catadromous \Ca*tad"ro*mous\, a. [Gr. kata` down + dro`mos a
     running.]
     1. (Bot.) Having the lowest inferior segment of a pinna
        nearer the rachis than the lowest superior one; -- said of
        a mode of branching in ferns, and opposed to {anadromous}.
        [1913 Webster]


  
     2. (Zool.) Living in fresh water, and going to the sea to
        spawn; -- opposed to {anadromous}, and said of the eel.
        [1913 Webster]

From WordNet (r) 2.0 [wn]:

  catadromous
       adj : migrating from fresh water to the sea to spawn [ant: {diadromous},
              {anadromous}]