torus

Etymology

From Latin torus (“swelling, protuberance”).

Pronunciation

• IPA^(key): /ˈtɔːɹəs/

• Audio (US)

  (file)

• Rhymes: -ɔːrəs
• Homophone: Taurus

Noun

torus (plural tori or toruses)

1. (topology) A topological space which is a product of two circles.

   A 4-variable Karnaugh map can be thought of, topologically, as being a torus.

2. (mathematics) The standard representation of such a space in 3-dimensional Euclidean space: a shape consisting of a ring with a circular cross-section: the shape of an inner tube or hollow doughnut.
3. (topology, in combination, n-torus, 4-torus, etc.) The product of the specified number of circles.
4. (architecture) A molding which projects at the base of a column and above the plinth.
5. (botany) The end of the peduncle or flower stalk to which the floral parts (or in the 'Asteraceae, the florets of a flower head) are attached; receptacle, thalamus.

Anagrams

• Rusto, Stour, Tours, roust, routs, stour, tours

Etymology 1

Etymology 2

Anagrams

• rusto, turso

Alternative forms

• thorus

Etymology

From Proto-Indo-European *sterh₃-.

Pronunciation

• (Classical) IPA^(key): /ˈto.rus/, [ˈtɔ.rʊs]

Noun

torus m (genitive torī); second declension

1. a swelling, protuberance, bulge, knot
2. the muscular part of an animal
3. raised ornament on a garland
4. bolster, cushion
5. (by extension) bed, couch
   1. marriage bed
6. (by extension, figuratively) marriage (sometimes any sexual relationship)
7. embankment, an elevation of earth
8. (architecture) large round molding at the base of a column

References

• torus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• torus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• torus in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette
• torus in The Perseus Project (1999) Perseus Encyclopedia‎
• torus in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
• torus in William Smith et al., editor (1890) A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin

Noun

torus c

1. (topology) torus; a shape consisting of a ring, or an object of the same topology residing in a space of higher dimension; especially considered as a Cartesian product of two circles in a four-dimensional space