Definition from Wiktionary, the free dictionary
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.
- 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.
surface in three-dimensional space