jan·thi·na
| \ ˈjan(t) thənə \
Definition of janthina
1
capitalized
: the type genus of Janthinidae comprising pelagic snails of warm seas that have a thin spiral purple shell, a large head, and protrusible gills
2
plural -s
: any snail of the genus Janthina
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Merriam-Webster unabridged
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