Concept information
Preferred term
sphere
Definition
- A sphere (from Ancient Greek σφαῖρα (sphaîra) 'globe, ball') is a geometrical object that is a three-dimensional analogue to a two-dimensional circle. A sphere is the set of points that are all at the same distance r from a given point in three-dimensional space. That given point is the centre of the sphere, and r is the sphere's radius. The earliest known mentions of spheres appear in the work of the ancient Greek mathematicians. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Sphere)
Broader concept
Narrower concepts
Entry terms
- spherical surface
In other languages
-
French
-
surface sphérique
URI
http://data.loterre.fr/ark:/67375/MDL-PHJ5RMS3-0
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