amphibian Meaning, Definition & Usage

  1. noun a flat-bottomed motor vehicle that can travel on land or water
    amphibious vehicle.
  2. noun an airplane designed to take off and land on water
    amphibious aircraft.
  3. noun cold-blooded vertebrate typically living on land but breeding in water; aquatic larvae undergo metamorphosis into adult form
  4. adjective relating to or characteristic of animals of the class Amphibia
    amphibious.

WordNet

Am*phib"i*an adjective
Definitions
  1. (Zoöl.) Of or pertaining to the Amphibia; as, amphibian reptiles.
Am*phib"i*an noun
Definitions
  1. (Zoöl.) One of the Amphibia.

Webster 1913