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hy·per·bo·loid  (hi-pûrbə-loid′)
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Tweet n. Either of two quadric 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. hy·per′bo·loid′al(-loidl)adj.  (click for a larger image) hyperboloidtop: hyperboloid of one sheet bottom: hyperboloid of two sheets |
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