Purple of mollusca
|(Zool.)||a coloring matter derived from certain mollusks, which dyes wool, etc., of a purple or crimson color, and is supposed to be the substance of the famous Tyrian dye. It is obtained from Ianthina, and from several species of Purpura, and Murex.|
See also: Purple
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.