Definitions

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

  • n. See sea squirt.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any member of the class Ascidiacea (the sea squirts)

from the GNU version of the Collaborative International Dictionary of English

  • n. One of the Ascidioidea, or in a more general sense, one of the Tunicata. Also as an adj.

from The Century Dictionary and Cyclopedia

  • Of or belonging to the Ascidia or Tunicata.
  • n. One of the Ascidia or Tunicata; a sea-squirt.

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

  • n. minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves

Etymologies

From New Latin Ascidia, genus name, from Greek askidion, diminutive of askos, wineskin.
(American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

  • It is an interesting fact that vanadium is an essential element to [[ascidian]] s, also known as sea squirts.

    Vanadium

  • Kenjo A, et al., Cloning and characterization of novel ficolins from the solitary ascidian, Halocynthia roretzi.

    Behe vs Sea Squirts - The Panda's Thumb

  • A new transglutaminase-like from the ascidian Ciona intestinalis.

    Behe vs Sea Squirts - The Panda's Thumb

  • On the left is a urochordate, an ascidian, a sessile, filter-feeding blob that is anchored to rocks or pilings and sucks in sea water to extract microorganismal meals.

    Ascidian evo-devo - The Panda's Thumb

  • The colour of the ascidian is in some cases sallow, and in other cases red.

    The History of Animals

  • As a general rule, then, all testaceans grow by spontaneous generation in mud, differing from one another according to the differences of the material; oysters growing in slime, and cockles and the other testaceans above mentioned on sandy bottoms; and in the hollows of the rocks the ascidian and the barnacle, and common sorts, such as the limpet and the nerites.

    The History of Animals

  • The so-called tethyum or ascidian has of all these animals the most remarkable characteristics.

    The History of Animals

  • With regard to testaceans, of the walking or creeping species the urchin appears to have the least developed sense of smell; and, of the stationary species, the ascidian and the barnacle.

    The History of Animals

  • If the animal be opened, it is found to have, in the first place, a tendinous membrane running round inside the shell-like substance, and within this membrane is the flesh-like substance of the ascidian, not resembling that in other molluscs; but this flesh, to which I now allude, is the same in all ascidia.

    The History of Animals

  • In the transition that once took place from one species of ascidian larva to a form similar to the lancelet fish, he sees the new branch diverging in the series of vertebrates.

    The Theories of Darwin and Their Relation to Philosophy, Religion, and Morality

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Comments

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  • JM wants to meet an ascidian so he can say 'Howdy, squirt!' without fear of getting punched in the nose.

    July 25, 2010

  • I see. Thanks!

    September 29, 2008

  • The ascidians have been broken up into several groups, so some things called sea squirts are no longer classified as ascidians, but with the Stolidobranchiata, for example. There are also compound ascidians that you probably wouldn't think of as sea squirts. They're all classified as tunicates (which are related to chordates not mollusks).

    September 29, 2008

  • A.k.a. sea squirt, yes mollusque?

    Even if it isn't, I just like saying sea squirt.

    September 29, 2008

  • They're no longer considered to be part of the Mollusca.

    September 27, 2008

  • OED: A. adj. Of or pertaining to the Ascidia (or Ascidiæ), a group of animals belonging to the tunicate Mollusca, considered by evolutionists to constitute a link in the development of the Vertebrata. B. n. A member of this group. see -ARIUM, the aggregate mass of organisms in compound ascidians. asmscidioid a., resembling the Ascidia. ascidiozooid, one of the organisms forming an ascidiarium.

    September 27, 2008

  • OED: A. adj. Of or pertaining to the Ascidia (or Ascidiæ), a group of animals belonging to the tunicate Mollusca, considered by evolutionists to constitute a link in the development of the Vertebrata. B. n. A member of this group. see -ARIUM, the aggregate mass of organisms in compound ascidians. asmscidioid a., resembling the Ascidia. ascidiozooid, one of the organisms forming an ascidiarium.

    September 27, 2008