English
hyperboloid
From hyperbola + -oid.
A compound of hyperbola + -oid
Proto-Indo-European *gʷelH- ‘to hit by throwing’
…
Ancient Greek βάλλω ‘to throw, cast, hurl’
Ancient Greek ὑπερβάλλω ‘to throw over or beyond (a mark), to overshoot’
Ancient Greek ὑπερβολή ‘overshooting’
New Latin hyperbola
English hyperbola
Today it means
noun 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.
Language periods are conventional ranges, not dates for this word.
Etymograph / hyperboloid