hyperboloid

== English == === Etymology === From hyperbola +‎ -oid. === Noun === hyperboloid (plural hyperboloids) A particular surface in three-dimensional Euclidean space, the graph of a quadratic with all three variables squared and their coefficients not all of the same sign. ==== Usage notes ==== If the hyperboloid is a connected surface, it is said to be of one sheet; otherwise, it has two components and is said to be of two sheets. Like many terms that start with a non-silent h but have emphasis on their second syllable, some people precede hyperboloid with an, others with a. ==== Hypernyms ==== quadric surface, quadric ==== Derived terms ==== ==== Translations ==== ==== Further reading ==== hyperboloid on Wikipedia.Wikipedia