Definition of anadromous
: ascending rivers from the sea for breeding shad are anadromous — compare catadromous
Origin and Etymology of anadromous
Greek anadromos running upward, from anadramein to run upward, from ana- + dramein to run — more at dromedary
First Known Use: circa 1753
Seen and Heard
What made you want to look up anadromous? Please tell us where you read or heard it (including the quote, if possible).