[ hahy-pur-buh-loid ]
/ haɪˈpɜr bəˌlɔɪd /
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a quadric surface having a finite center and some of its plane sections hyperbolas. Equation: x2/a2 + y2/b2 − z2/c2 = 1.
QUIZ YOURSELF ON "WAS" VS. "WERE"!
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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.
OTHER WORDS FROM hyperboloidhy·per·bo·loi·dal, adjective
Words nearby hyperboloid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for hyperboloid
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
In the first case the surface is called an Hyperboloid of one sheet, in the second an Hyperbolic Paraboloid.
British Dictionary definitions for hyperboloid
/ (haɪˈpɜːbəˌlɔɪd) /
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
[ 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.