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.