noun (plural tori /ˈtɔːrʌɪ/ or toruses)
1 Geometry A surface or solid formed by rotating a closed curve, especially a circle, about a line which lies in the same plane but does not intersect it (e.g. like a ring doughnut).
- To be rigorous, the hole is not actually in the torus: the torus is the surface and the hole is in the space around the surface.
- A small patch of a sphere or torus surface looks almost like a piece of a flat plane and has area rather than volume.
- ‘In other words, each solution could be drawn on the surface of a torus,’ he notes.
1.1A ring-shaped object, especially a large ring-shaped chamber used in physical research.
- Like tokamaks, their currently more advanced cousins, stellarators use magnetic fields to confine plasma in a torus for fusion reactions.
- This remarkable device consists of a torus of alternating magnetic materials that are chosen so that the torus has a huge net spin - 10 22 aligned electron spins - yet produces no magnetic field.
- By carefully accounting for the particles injected into the machine and for those exhausted in the pumping system we found a deficit, indicating that a large fraction of deuterium gets trapped in the walls and components inside the torus.
2 Architecture A large convex moulding, typically semicircular in cross section, especially as the lowest part of the base of a column.
- One stand has a torus molding with red-painted triglyph and metopal sections, while a lower register has alternating black and white sections.
- A long cylindrical bar of orange-painted steel evokes a tori (temple gate) and serves as a balustrade.
- The gadrooned flattened torus moulding, shown on the shelf or footrest of the stand in the engraving also appears on the stretchers of the Blenheim stands.
3 Anatomy A ridge of bone or muscle: the maxillary torus
More example sentences
- The supraorbital torus is lost in most modern humans, and ridging above the orbits in general is very reduced.
- A torus, or ‘buckle,’ fracture of the distal radius is a common type of fracture in children.
- In children, the most common injury is the torus fracture, which occurs with a fall onto an outstretched hand.
Words that rhyme with torusbrachiosaurus, brontosaurus, canorous, chorus, Epidaurus, giganotosaurus, Horus, megalosaurus, pelorus, porous, sorus, stegosaurus, Taurus, thesaurus, tyrannosaurus
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