hyperboloid
[ hahypurbuhloid ]
/ haɪˈpɜr bəˌlɔɪd /

noun Mathematics.
a quadric surface having a finite center and some of its plane sections hyperbolas. Equation: x 2/a 2 + y 2/b 2 − z 2/c 2 = 1.
Nearby words
 hyperbolic function,
 hyperbolic geometry,
 hyperbolic paraboloid,
 hyperbolism,
 hyperbolize,
 hyperborean,
 hyperboreans,
 hypercalcemia,
 hypercalciuria,
 hypercapnia
Origin of hyperboloid
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for hyperboloid
In the first case the surface is called an Hyperboloid of one sheet, in the second an Hyperbolic Paraboloid.
At the top it is gathered into a dome in the form of a hyperboloid, pierced near the vertex with an aperture 12 feet in diameter.
Old and New LondonWalter Thornbury
hyperboloid
/ (haɪˈpɜːbəˌlɔɪd) /
noun
a geometric surface consisting of one sheet, or of two sheets separated by a finite distance, whose sections parallel to the three coordinate planes are hyperbolas or ellipses. Equations x ²/ a ² + y ²/ b ² – z ²/ c ² = 1 (one sheet) or x ²/ a ² – y ²/ b ² – z ²/ c ² = 1 (two sheets) where a, b, and c are constants
Collins English Dictionary  Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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hyperboloid
[ hīpûr′bəloid′ ]
Either of two surfaces generated by rotating a hyperbola about either of its main axes and having a finite center, with certain plane sections that are hyperbolas and others that are ellipses or circles.
The American Heritage® Science Dictionary
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