Bagel shape, in math-speak

Usage examples of toroid.

Confederation Astronautics Board to carry freight and up to twenty passengers, crew toroid refurbished, and crew-members in a tigerish frame of mind.

Crew quarters nestled in the upper hull groove, a chrome-silver toroid equipped with lounges, cabins, a small hangar for the atmospheric flyer, fusion generators, fuel, life-support units.

We can send messages by beaming a gamma frequency microlaser into a microscopic black-hole toroid that can be generated in equipment capable of operating on planetary surfaces without undesirable side effects.

Jevlen was light-years away from Gistar, and the only way of getting ships there was through black-hole toroids projected by VISAR.

I mounted two Reynald toroids with opposite fields on an optical bench pointed along the direction of the dipole asymmetry and varied their separation.

There was no crew toroid, instead three silvery mechanical capsules were fixed equidistantly around the upper hull.

Cell division starts with a generation of ring-like threads, chromonemata equivalents, which anneal to the toroids, facilitating duplication.

The starship began to break apart, its tanks, drive tubes, tokamak toroids, energy patterning nodes, heat exchangers, and a swarm of subsidiary mechanisms forming a slowly expanding clump.

In other words, he started increasing the current in the toroids and he turned the function generators on that are connected to the field coils.

A simple ring five hundred meters in diameter, it looked like a toroid of black hexagonal netting encasing a weak-glowing neon tube.

He drew the double superconducting toroids they’d found remounted on the City Builder spacecraft: Bussard ramjets taken from their mountings on the rim wall.