Amphibian
amphibians Audio
am·phib·i·ans [ am-fib-ee-uhnz ]
Subclass of:
Vertebrates
Definitions related to amphibians:
  • (amphibia) A taxonomic class of vertebrates that include frogs, toads, newts, salamanders, and gymnophiona. Amphibians are cold blooded land animals that lay eggs in the water. The juveniles of this class metamorphose from water-breathing organisms to air-breathing organisms upon adult maturation.
    NCI
    U.S. National Cancer Institute, 2021
  • (amphibia) Cold blooded chordates; larva are usually aquatic, breathing by gills; adults are terrestrial or aquatic, breathing by lungs and through moist glandular skin.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • VERTEBRATES belonging to the class amphibia such as frogs, toads, newts and salamanders that live in a semiaquatic environment.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
Try this search on: Farlex, Merriam-Webster, Oxford Dictionary, or Wordnik

This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.