from The Century Dictionary.

  • noun In biology, an opening, as a fissure or cleft; a long or narrow aperture.
  • noun In conchology, the fissure or aperture between the valves of a bivalve shell when the hymen is removed.

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

  • noun (Anat.) A narrow and elongated aperture; a cleft; a fissure.

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

  • noun anatomy A cleft or gap between two symmetrical parts, particularly between the vocal folds.
  • noun astronomy A crack or fissure on a lunar or planetary surface; a rille.

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

  • noun a narrow elongated opening or fissure between two symmetrical parts


Sorry, no etymologies found.


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