catadromous Meaning, Definition & Usage

  1. adjective migrating from fresh water to the sea to spawn

WordNet

Ca*tad"ro*mous adjective
Etymology
Gr. down + a running.
Definitions
  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.
  2. (Zoöl.) Living in fresh water, and going to the sea to spawn; -- opposed to anadromous, and of the eel.

Webster 1913