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hypabyssal
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hyperboloid
hy·per·bo·loid [ hī púrbə lòyd ] (plural hy·per·bo·loids)


noun 
Definition:
 
mathematical surface: a mathematical surface whose sections parallel to one coordinate plane form ellipses and those parallel to the other two coordinate planes form hyperbolas

hy·per·bo·loid·al [ hī pùrbə lóyd'l ] adjective
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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