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Webster 1913 Edition


Torus


To′rus

(tō′rŭs)
,
Noun.
;
pl.
Tori
(tō′rī)
.
[L., a round, swelling, or bulging place, an elevation. Cf. 3d
Tore
.]
1.
(Arch.)
A large molding used in the bases of columns. Its profile is semicircular. See Illust. of
Molding.
Brande & C.
2.
(Zool.)
One of the ventral parapodia of tubicolous annelids. It usually has the form of an oblong thickening or elevation of the integument with rows of uncini or hooks along the center. See Illust. under
Tubicolae
.
3.
(Bot.)
The receptacle, or part of the flower on which the carpels stand.
4.
(Geom.)
(a)
The surface described by the circumference of a circle revolving about a straight line in its own plane.
(b)
The solid inclosed by such a surface; – sometimes called an
anchor ring
.

Syn. –3d Tore{2}.

Webster 1828 Edition


Torus

TO'RUS

,
Noun.
A molding. [See Tore.]

Definition 2024


Torus

Torus

See also: torus

German

Noun

Torus m (genitive Torus, plural Tori)

  1. torus (shape)

See also

  • Wulst

torus

torus

See also: Torus

English

A geometrical torus

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; see receptacle.

Derived terms

Translations

See also

Anagrams


Finnish

Verb

torus

  1. Second-person singular imperative present form of torua + the suffix -s.

Anagrams


Latin

Etymology

From Proto-Indo-European *sterh₃-.

Alternative forms

Pronunciation

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
  6. embankment, an elevation of earth
  7. (architecture) large round molding at the base of a column

Inflection

Second declension.

Case Singular Plural
nominative torus torī
genitive torī torōrum
dative torō torīs
accusative torum torōs
ablative torō torīs
vocative tore torī

Derived terms

Descendants

References


Swedish

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

Declension

Inflection of torus 
Singular Plural
Indefinite Definite Indefinite Definite
Nominative torus torusen torusar torusarna
Genitive torus torusens torusars torusarnas

Related terms

  • flat torus