Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A small squid of the genus Spirula, having a spirally coiled, chambered, internal shell often found on beaches.

from The Century Dictionary.

  • noun In Cephalopoda: A genus of sepioid cuttlefishes, typical of the family Spirulidaæ, having a delicate shell in the hinder part of the body rolled into a flat or discoidal spiral, with discrete whorls whose involute spire presents ventrally, and no guard.
  • noun A member of this genus.
  • noun In sponges, an irregular spineless polyact spicule of spiral form.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Zoöl.) A genus of cephalopods having a multilocular, internal, siphunculated shell in the form of a flat spiral, the coils of which are not in contact.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun zoology Any of the cephalopod genus Spirula

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

  • noun a small tropical cephalopod of the genus Spirula having prominent eyes and short arms and a many-chambered shell coiled in a flat spiral

Etymologies

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

[Late Latin spīrula, twisted cake, diminutive of Latin spīra, coil; see spire.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Diminutive of Latin spira ("a coil")

Examples

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