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Webster's Dictionary (1865)

Spa-tăng'gus, n.

noun

[Lat. spatangius, Gr. σπατάγγης, a kind of sea-urchin.] (Zool.) A genus of pedicellate echinodermatous animals.

An illustration of a violet spatangus, a heart-shaped sea urchin.
Violet Spatangus (S. purpureus).