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Webster 1828 Edition

Noun.

[sea and star.] The starfish, a genus of marine animals, called technically Asterias.

See also: seastar and sea star

sea-star ‎(plural sea-stars)

(obsolete) A star used for navigation or guidance at sea.
- 1658: By the same number doth nature divide the circle of the Sea-Starre — Sir Thomas Browne, The Garden of Cyrus (Folio Society 2007, p. 188)