toroid

/ˈtɔrɔɪd/
noun
  1. A surface or shape shaped like a donut, formed by rotating a circle around an axis that does not intersect it.
    • The engineer designed a toroid for the magnetic coil.
    • In geometry class, we learned how to calculate the volume of a toroid.
    • A donut is a common example of a toroid.
Synonyms