[am.phib.i.ous] adj [Gk amphibios, lit., living a double life, fr. amphi- + bios mode of life--more at quick] (1643) 1: combining two characteristics
2. a: relating to or adapted for both land and water "~ vehicles" b: executed by coordinated action of land, sea, and air forces organized for invasion; also: trained or organized for such action "~ forces"
3: able to live both on land and in water "~ plants" -- am.phib.i.ous.ly adv -- am.phib.i.ous.ness n