from The Century Dictionary.

  • noun The leading genus of bivalves of the family Unionidæ: formerly used with great latitude for many species, some of which are now placed in other families as well as in other genera.
  • noun [lowercase] A species of this genus; any river-mussel.

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

  • noun (Zoöl.) Any one of numerous species of fresh-water mussels belonging to Unio and many allied genera.

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

  • noun Any of the genus Unio of freshwater mussels.

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

  • noun type genus of the family Unionidae


from Wiktionary, Creative Commons Attribution/Share-Alike License

From the genus name.


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