Definition:Astroid

Definition
An astroid is a hypocycloid with $4$ cusps.


 * Astroid.png

Also known as
Some sources do not recognise the name astroid, but instead just refer to it as what it is, that is: a hypocycloid with $4$ cusps.

Some sources refer to the astroid as a star curve.

Also see

 * Equation of Astroid