Definition:
πορφύρα, -ας, ἡ [in LXX for אַרְגָּמָן, אַרְגְּוָן;] 1) the purple fish (cf. 1Ma.4:23). 2) purple dye. 3) Later, = πορφυρίς, a purple garment: Mrk.15:17, 20, Luk.16:19, Rev.18:12. (AS)
Definition:
the "purple" mussel, i.e. (by implication) the red-blue color itself, and finally a garment dyed with it; purple; of Latin origin;