[mu.rex] n, pl mu.ri.ces or mu.rex.es [NL, fr. L, mollusk yielding a purple dye; akin to Gk myak-, myax mussel] (1589): any of a genus (Murex) of marine gastropod mollusks having a rough and often spinose shell, abounding in tropical seas, and yielding a purple dye
MUREX
Meaning of MUREX in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012