Definitions

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

  • n. A spicule or similar needlelike structure, such as a spine of an echinoderm or a copulatory organ in a nematode.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A thrusting javelin used by Romans that replaced the pilum in the late 3rd century.
  • n. A sharp, pointed crystal, especially of ice.
  • n. A sharp, needle-like structure, especially those making up the skeleton of a sponge.
  • n. A small radial emission of gas seen in the chromosphere and corona of the sun.

from the GNU version of the Collaborative International Dictionary of English

  • n. Same as spicule.

from The Century Dictionary and Cyclopedia

  • n. In zoology, a spicula or spicule.
  • n. A needle-shaped splinter of bone.

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

  • n. small pointed structure serving as a skeletal element in various marine and freshwater invertebrates e.g. sponges and corals

Etymologies

Latin spīculum, diminutive of spīca, point, ear of grain.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin spīculum ("a little, sharp point"), from spīcum, alternative form of spīca ("point, spike"). (Wiktionary)

Examples

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