hyperboloid

[ hahy-pur-buh-loid ]

nounMathematics.
1. a quadric surface having a finite center and some of its plane sections hyperbolas. Equation: x2/a2 + y2/b2z2/c2 = 1.

Origin of hyperboloid

1
First recorded in 1720–30; hyperbol(a) + -oid

Words Nearby hyperboloid

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use hyperboloid in a sentence

• 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

hyperboloid

/ (haɪˈpɜːbəˌlɔɪd) /

noun
1. 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-pûrbə-loid′ ]

1. 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.