I*an"thi*na (?), n.; pl. L. Ianthinae (#), E. Ianthinas (#). [NL., fr. L. ianthinus violet-blue, Gr. ; violet + flower.] Zool.

Any gastropod of the genus Ianthina, of which various species are found living in mid ocean; -- called also purple shell, and violet snail.

[Written also janthina.]

⇒ It floats at the surface by means of a raft, which it constructs by forming and uniting together air bubbles of hardened mucus. The Tyrian purple of the ancients was obtained in part from mollusks of this genus.

 

© Webster 1913.

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