Any of various marine gastropods of the genus Murex common in tropical seas and having rough spiny shells, especially M. trunculus, the source of Tyrian purple.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "murex" in a sentence
"Is this indeed the "murex," as Browning calls it, of the Tyrian purple, which can be found on the Minehead rocks at low-tide by the holiday-makers of our day?"
"The whole verse of course begins to explain itself, if we know the meaning of the word "murex," which is the name of a sea-shell, out of which was made the celebrated blue dye of Tyre."
""The 'murex' contains a dye of miraculous beauty; and this once extracted and bottled, Hobbs, Nobbs, and Co. may trade in it and feast; but the poet who (figuratively) brought the murex to land, and created its value, may, as Keats probably did, eat porridge all his life.""