hyperboloid

English

Etymology

Etymology tree
Proto-Indo-European *úp
Proto-Indo-European *-er
Proto-Indo-European *upér
Proto-Hellenic *(h)upér
Ancient Greek ῠ̔πέρ (hŭpér)
Ancient Greek ὑπερ- (huper-)
Proto-Indo-European *gʷelH-der.
Proto-Hellenic *gʷəlnō
Ancient Greek βάλλω (bállō)
Ancient Greek ὑπερβάλλω (huperbállō)
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Hellenic *-ā́
Ancient Greek -ᾱ (-ā)
Ancient Greek -η (-ē)
Ancient Greek ὑπερβολή (huperbolḗ)bor.
New Latin hyperbolabor.
English hyperbola
Ancient Greek -ο- (-o-)
Proto-Indo-European *weyd-
Proto-Indo-European *-os
Proto-Indo-European *wéydos
Proto-Hellenic *wéidos
Ancient Greek εἶδος (eîdos)
Proto-Indo-European *-os
Proto-Indo-European *-s
Proto-Indo-European *-ēs
Proto-Hellenic *-ēs
Ancient Greek -ης (-ēs)
Ancient Greek -ειδής (-eidḗs)
Ancient Greek -οειδής (-oeidḗs)bor.
Latin -oīdēslbor.
English -oid
English hyperboloid

    From hyperbola + -oid.

    Pronunciation

    Noun

    an hyperboloid of one sheet

    hyperboloid (plural hyperboloids)

    1. 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.
    • As with 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

    Derived terms

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    Further reading

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