tetrapod -- n. An animal with four limbs that evolved from a common fish ancestor during the Devonian Period (~365 million years ago). Tetrapods include amphibians, reptiles, birds, and mammals.
tetrapod
A vertebrate possessing two pairs of limbs, such as amphibians, reptiles, birds, and mammals.
thalamus ...
tetrapods A nontaxonomic designation used to refer to amphibians, reptiles, birds, and mammals.
tetrathyridium Only metacestode form known in the tapeworm cyclophyllidean genus Mesocestoides. A large, solid-bodied cysticercoid.
The "Tetrapods"
The term "tetrapod" (meaning four-limbed or four-footed) has historically been applied to the land vertebrates (amphibians, reptiles, dinosaurs, birds, and mammals).
Superclass Tetrapoda (four-limbed vertebrates)
Class Amphibia (amphibians)
Series Amniota (amniotic embryo) ...
Tetrahymena thermophila Tetraparental mouse Tetrapods TFIID (Transcription factor IID) Thalamus THC (delta-9-tetrahydrocannabinol) Thecodonts Thelytoky, ...
These "stem tetrapods" as they are known, were essentially fish out of water.
Herpetology deals with what are called the cold-blooded tetrapods, that is, those land vertebrates which are ectothermic (deriving their body temperature from their environment) rather than endothermic (deriving their body heat from an independent, ...
 See also: Animal, Species, Tetrapods, Evolution, Organ
  
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