Definitions for murexˈmyʊər ɛks; ˈmyʊər əˌsiz
Random House Webster's College Dictionary
mu•rexˈmyʊər ɛks; ˈmyʊər əˌsiz(n.)(pl.)mu•ri•ces; mu•rex•es.
any marine gastropod of the genus Murex, common in tropical seas, certain species of which yield a royal purple dye valued by the ancients.
Origin of murex:
1580–90; < NL, L mūrex the shellfish that yielded Tyrian purple dye
a genus of marine gastropods, having rough, and frequently spinose, shells, which are often highly colored inside; the rock shells. They abound in tropical seas