'Janthina' definitions:

Definition of 'Janthina'

From: GCIDE
  • Janthina \Jan"thi*na\, n. (Zool.) See Ianthina. [1913 Webster]

Definition of 'janthina'

From: GCIDE
  • Ianthina \I*an"thi*na\, n.; pl. L. Ianthin[ae], 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.] [1913 Webster]
  • Note: 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. [1913 Webster]