# hyperboloid

[ hahy-pur-buh-loid ]

/ 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.

## Words nearby hyperboloid

## Origin of hyperboloid

## OTHER WORDS FROM hyperboloid

hy·per·bo·loi·dal, adjectiveDictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

## 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 London|Walter Thornbury

## British Dictionary definitions for hyperboloid

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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Scientific definitions for hyperboloid

hyperboloid

[ hī-pûr′bə-loid′ ]

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
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.