murex
noun
mu·rex
| \ ˈmyu̇r-ˌeks
\
\
plural murices\ ˈmyu̇r-ə-ˌsēz
\
or murexes
\
or murexes
Definition of murex
: any of a genus (Murex of the family Muricidae) of marine gastropod mollusks having a rough and often spiny shell, abounding in tropical seas, and yielding a purple dye
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