Definitions

from The Century Dictionary.

  • noun In heraldry, same as mullet.
  • noun A plane curve of the sixth class and fourth order, having two conjugate diameters of a conic and the line at infinity as inflectional tangents.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun geometry A hypocycloid with four cusps.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Ancient Greek ἄστρον (astron, "a star") + εἶδος (eidos, "form, likeness").

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