- Bot. with leaf veins radiating in a fanlike arrangement
- Zool. migrating between fresh and salt water: said of certain fishes
Origin of diadromousdia- + -dromous
- (of a migratory fish) a fish that travels between salt water and fresh water
From dia- (“across”) + -dromous (< Ancient Greek δρόμος (dromos, “running, path, way”)). Compare Modern Greek διάδρομος (diádromos, “corridor”).