mu·rex 
(myrĕks)
(myrĕks)n. pl. mu·ri·ces (myrĭ-sēz′) or mu·rex·es
Any of various predatory marine gastropods of the family Muricidae, having rough spiny shells and including several species formerly used to produce the dye Tyrian purple.
[New Latin mūrex, from Latin, gastropod producing Tyrian purple, probably of pre-Roman Mediterranean origin.]
- exteriorly
- exterminate
- extermination
- exterminative
- exterminator
- exterminatory
- extern
- external
- external auditory canal
- external capsule
- external-combustion engine
- external ear
- externalism
- externalist
- externality
- externalization
- externalize
- externally
- external phase
- external respiration
- externe
- externship
- exteroceptive
- exteroceptor
- exterritorial