A-ply̆s'i-a, n.

A-ply̆s'i-a, n. [Gr. ἀπλυσίας, a dirty sponge, from ἄπλυτος; ἀ priv. and πλύειν, to wash.] The sea-hare, a genus of mollusks of the order Tectibranchiata. Some of the species have the power of throwing out a deep purple liquor, with which the animal colors the water around to a considerable distance, when it perceives any danger. Carpenter.