from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A hypocycloid with four cusps.
from The Century Dictionary and Cyclopedia
- n. In heraldry, same as mullet.
- n. 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.
Ancient Greek ἄστρον (astron, "a star") + εἶδος (eidos, "form, likeness"). (Wiktionary)