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TETRAPOD [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2003-06-17

English

Subject field(s)
  • Reptiles and Amphibians
  • Paleontology
DEF

A four-footed animal: quadruped.

CONT

The earliest amphibians arose from a primitive group of lobe fins (the rhipidistians), and so all four-footed vertebrates (tetrapods) and their descendants also evolved from this vanished fish stock.

OBS

Used chiefly of higher terrestrial vertebrates.

OBS

Compare "quadruped."

Key term(s)
  • four-legged vertebrate
  • four-footed vertebrate
  • four-legged animal
  • four-footed animal

French

Domaine(s)
  • Reptiles et amphibiens
  • Paléontologie
CONT

Les plus anciens Amphibiens sont issus d'un groupe primitif de Poissons à nageoire en lobe (Rhipidistiens) et, ainsi, tous les Vertébrés à quatre membres (Tétrapodes) et leurs descendants proviennent de ce lot de Poissons disparus.

OBS

Le terme de «quadrupède» ne s'applique pratiquement qu'à des vertébrés terrestres. À l'exception des oiseaux, la plupart des tétrapodes terrestres sont des quadrupèdes.

Spanish

Campo(s) temático(s)
  • Reptiles y anfibios
  • Paleontología
Save record 1

Record 2 1998-06-12

English

Subject field(s)
  • Dams and Causeways
  • Tunnels, Overpasses and Bridges
DEF

A large reinforced concrete object having four arms and used especially for protecting breakwaters from wave damage.

French

Domaine(s)
  • Barrages et chaussées
  • Tunnels, viaducs et ponts
DEF

Bloc de béton de forme spéciale, comportant quatre parties saillantes de forme tronconique, dirigées comme les quatre hauteurs d'un tétraèdre régulier à partir du centre vers les sommets.

OBS

Les Tétrapodes sont utilisés pour construire des digues et des jetées de protection, des batardeaux, de petits barrages. Leur forme particulière permet de les enchevêtrer les uns dans les autres pour constituer une structure peu sensible à l'action des vagues.

Spanish

Save record 2

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