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Definition of Confocal
1. a. Having the same foci; as, confocal quadrics.
Definition of Confocal
1. Adjective. (optics) (mathematics) Having the same foci ¹
¹ Source: wiktionary.com
Definition of Confocal
1. having the same focus or foci [adj]
Medical Definition of Confocal
1. See: confocal microscope. (05 Mar 2000)
Lexicographical Neighbors of Confocal
Literary usage of Confocal
Below you will find example usage of this term as found in modern and/or classical literature:
1. A Treatise on Conic Sections: Containing an Account of Some of the Most by George Salmon (1904)
"In the first place, we assert that if the vertex T of an angle PTQ circumscribing
a conic, move on a confocal conic (see fig., Art. 399) ; and if we denote ..."
2. Report of the Annual Meeting (1892)
"The Geometry of confocal Conies. By Professor TC LEWIS. 1. If PP', QQ' be chorda
of contact of T in two confocal conies, then a conic can be described with ..."
3. A Treatise on the Analytic Geometry of Three Dimensions by George Salmon (1882)
"Two concentric and coaxal conies arc said to be confocal when the difference of
... Thus given an ellipse — « + TJ = 1 > any conic is confocal with it whose ..."
4. Transactions of the Kansas Academy of Science by Kansas Academy of Science (1896)
"Two confocal pedal curves cut one another at right angles at all their common
pointe. 1. The difference of the squares of the perpendiculars drawn from the ..."
5. Projective Geometry by Linnaeus Wayland Dowling (1917)
"confocal Elements in a Double Polarity.—When two polarities are in the same ...
Any line upon which the two involutions coincide is a confocal line of the ..."
6. Transactions of the Annual Meetings of the Kansas Academy of Science by Kansas Academy of Science, Kansas Academy of Science Meeting (1896)
"Two confocal pedal curves cut one another at right angles at all their common
points. 1. The difference of the squares of the perpendiculars drawn from the ..."
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