# geometry
## English
### Etymology

From Middle English gemetry, geometrie, from Old French geometrie (modern French géométrie), from Latin geōmetria, from Ancient Greek γεωμετρία (geōmetría, “geometry, land-survey”), from γεωμέτρης (geōmétrēs, “land measurer”), from γῆ (gê, “earth, land, country”) + -μετρία (-metría, “measurement”), from μέτρον (métron, “a measure”). By surface analysis, geo- +‎ -metry. Doublet of gematria.

### Pronunciation

* (Received Pronunciation) IPA: /d͡ʒiːˈɒm.ɪ.tɹi/, /ˈd͡ʒɒm.ɪ.tɹi/
* (General American) IPA: /d͡ʒiˈɑ.mə.tɹi/
** Audio (US):(file)
* (General Australian) IPA: /d͡ʒiːˈɔm.ə.tɹi/

### Noun

geometry (countable and uncountable, plural geometries)
* (mathematics, uncountable) The branch of mathematics dealing with spatial relationships.
** 1925, René Descartes, “The Geometry of Rene Descartes”, in David Eugene Smith, Marcia Latham, transl., [1637, La Géométrie], Cosimo Classics, published 2007, page 2:ANY problem in geometry can easily be reduced to such terms that a knowledge of the lengths of certain straight lines is sufficient for its construction.
* (mathematics, often qualified in combination, countable) A mathematical system that deals with spatial relationships and that is built on a particular set of axioms; a subbranch of geometry which deals with such a system or systems.
** 1975 [Addison-Wesley], Eugene F. Krause, Taxicab Geometry, 1986, Dover, page 64,
    Entire new geometries are also suggested by real-world cities.
** 2004, Judith Cederberg, A Course in Modern Geometries, Springer, page 1:Finite geometries were developed in the late nineteenth century, in part to demonstrate and test the axiomatic properties of completeness, consistency, and independence.
** 2006, Mark Wagner, The Geometries of Visual Space, Lawrence Erlbaum Associates, page ix:Previous theorists have often tried to test whether visual space is best described by a small set of traditional geometries, such as the Euclidean geometry most of us studied in High School or the hyperbolic and spherical geometries introduced by 19th-century mathematicians.
* (countable) The observed or specified spatial attributes of an object, etc.
** 1990, M. E. Cage, D. Y. Yu, G. Marullo Reedtz, “Observation and an Explanation of Breakdown of the Quantum Hall Effect”, in Journal of Research of the National Institute of Standards and Technology, volume 95, number 1:The inset of figure 1 shows the geometry of the samples. They are 4.6 mm long and 0.4 mm wide.
** 2003, Matt Welsh, Running Linux, page 74:Also, certain SCSI controllers need to be told where to find drive geometry in order for Linux to recognize the layout of your drive.
** 2018 March 14, Roger Penrose, “'Mind over matter': Stephen Hawking – obituary”, in The Guardian:He was extremely highly regarded, in view of his many greatly impressive, sometimes revolutionary, contributions to the understanding of the physics and the geometry of the universe.
* (algebraic geometry, countable) A mathematical object comprising representations of a space and of its spatial relationships.

#### Holonyms

* mathematics

#### Derived terms

* absolute geometry
* affine differential geometry
* affine geometry
* algebraic geometry
* anabelian geometry
* analytical geometry
* analytic geometry
* arithmetic geometry
* astrogeometry
* birational geometry
* chronogeometry
* combinatorial geometry
* complex geometry
* computational geometry
* conformal geometry
* contact geometry
* descriptive geometry
* differential geometry
* diophantine geometry
* elementary geometry
* elliptic geometry
* Euclidean geometry
* finite geometry
* fractal geometry
* geoband
* geoboard
* geometrician
* geometrist
* geometrize
* geometrodynamics
* geometrogenesis
* geometrography
* geometrylike
* geometry of fear
* geometry of numbers
* geometry shader
* heptageometry
* hyperbolic geometry
* hypergeometry
* imaginary geometry
* inversive geometry
* Kerr geometry
* Klein geometry
* macrogeometry
* metageometry
* microgeometry
* morphogeometry
* nanogeometry
* neurogeometry
* noncommutative geometry
* noneuclidean geometry
* non-Euclidean geometry
* ophthalmogeometry
* pangeometry
* plane geometry
* pregeometry
* projective geometry
* Riemannian geometry
* sacred geometry
* spherical geometry
* stereogeometry
* supergeometry
* synthetic geometry
* taxicab geometry
* tropical geometry
* variable geometry

#### Related terms

* gematria
* geometer
* geometric
* geometrical

#### Translations
### See also

* topology

### References

* ↑ “ǧēmetrī(e, n.”, in MED Online, Ann Arbor, Mich.: University of Michigan, 2007.

### Further reading

* geometry on Wikipedia.Wikipedia
* William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “geometry”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.
* “geometry”, in OneLook Dictionary Search.
* Geometry on Encyclopedia of Mathematics.
* Geometry on Wolfram MathWorld.
* Geometry on Wikibooks.