from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Having four feet, legs, or leglike appendages.
  • n. A vertebrate animal with four feet, legs, or leglike appendages.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any vertebrate with four limbs.
  • n. Any vertebrate (such as birds or snakes) that have evolved from early tetrapods; especially all members of the superclass Tetrapoda
  • n. Concrete structures with 'arms' used to arrest wave energy along the shore in sea defence projects.
  • adj. Having four limbs or feet

from the GNU version of the Collaborative International Dictionary of English

  • n. An insect characterized by having but four perfect legs, as certain of the butterflies.

from The Century Dictionary and Cyclopedia

  • Four-footed; quadruped; specifically, having only four perfect legs, as certain butterflies; of or pertaining to the Tetrapoda.
  • n. A four-footed animal; a quadruped; specifically, a member of the Tetrapoda.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a vertebrate animal having four feet or legs or leglike appendages


from Wiktionary, Creative Commons Attribution/Share-Alike License

From tetra- ("four") and -pod, from podos ("foot").


  • Might they reflect my ‘real’ interests, or might they perhaps indicate which areas within tetrapod zoology are currently the most happening, interesting or sexy?

    Happy first birthday Tetrapod Zoology (part II)

  • One of my favourite ‘fringe’ subjects within tetrapod zoology concerns the alleged ability of eagles to attack and kill unusually large mammals, including people.

    Archive 2006-01-01

  • I will warn you, pre-emptively, that the affinities and ancestry of turtles is one of the most controversial subjects within tetrapod zoology ....

    Happy Christmas, from gigantic Spanish sauropods... or, alas, poor ‘Angloposeidon’

  • Their attack on a tetrapod is culminated as the bat drops onto the prey, encases it in its wings and bites it hard on the head or neck (Kulzer et al. 1984).

    Archive 2006-06-01

  • If I were to produce a list of the 100 most exciting discoveries made in tetrapod zoology within the last few years (which I won’t), then up there in the top 20 - at least - would be the Kayan Mentarang animal.

    That’s no mystery carnivore (part I)

  • One of the most asked about questions I’ve encountered in tetrapod zoology concerns the mysterious seals of Siberia’s Lake Baikal.

    The most inconvenient seal

  • From time to time people make the point that some really interesting, major events in tetrapod history must have occurred in ancient Antarctica – if only it wasn’t for that damned ice sheet.

    More on phorusrhacids: the biggest, the fastest, the mostest out-of-placest

  • Acanthostega was thought to have been the most primitive tetrapod, that is, the first vertebrate animal to possess limbs with digits rather than fish fins.

    GEN News Highlights

  • The footprints date back 395 million years and are about 18 million years older than the oldest known "tetrapod" fossil. - Frontpage RSS Feed

  • It's because all land vertebrates descended with modification from a four-legged ( "tetrapod") ancestor.

    U.S. News


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  • Don't believe it, but the photos are fascinating. At the end of World War II a lot of military hardware was dumped along the coastlines of Australia. It was supposed to slow erosion. Studies in the 80's showed that these miscellaneous bits of concrete and metal just increased turbulence in the intertidal zones and interfered with natural processes, generally increasing erosion. Of course it's possible Japan has different coastal conditions.

    August 12, 2008

  • Concrete tetrapods are supposed to slow coastal erosion.

    August 12, 2008