[gastropod] Nassa is a genus of sea snails, marine gastropod mollusks in the family Muricidae, the murex snails or rock snails. The history of the name Nassa is rather confused, because the name was allocated twice: In the 19th and much of the 20th century, all species that were added to the genus Nassa were Nassa mud snails belonging to th...
Found on
http://en.wikipedia.org/wiki/Nassa_(gastropod)

• (n.) Any species of marine gastropods, of the genera Nassa, Tritia, and other allied genera of the family Nassidae; a dog whelk. See Illust. under Gastropoda. • (n.) Any species of marine gastropods, of the genera Nassa, Tritia, and other allied genera of the family Nassidae; a dog whelk. See Illust. under Gastropoda.Nassa: words in the...
Found on
http://thinkexist.com/dictionary/meaning/nassa/
Nas'sa noun ;
plural English
Nassas , Latin
NassÆ . [ From Latin
nassa a kind of basket, in allusion to the reticulation of some species.]
(Zoology) Any species of marine gastropods, of the genera
Nassa ,
Tritia , and other allied genera of the family...
Found on
http://www.encyclo.co.uk/webster/N/4

The nassa is a genus of Buccinidae. The shell resembles that of Buccinium, but is smaller. The genus is chiefly distinguished from the Whelks by having a columnellar lip expanded with callous, with a tooth near the anterior canal.
Found on
http://www.probertencyclopaedia.com/browse/BN.HTM
No exact match found.