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8 Words That Are Older Than You Think

witch of Agnesi

[ah-nyey-zee] /ɑˈnyeɪ zi/
noun, Geometry
1.
a plane curve symmetrical about the y- axis and asymptotic to the x- axis, given by the equation x 2 y =4 a 2 (2 ay).
Also called versiera.
Origin
1870-1875
1870-75; named after Maria Gaetana Agnesi (1718-99), Italian mathematician and philosopher
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for witch-agnesi

witch of Agnesi

/ɑːnˈjeɪzɪ/
noun
1.
(maths) a plane curve, symmetrical about the y-axis, having the equation x²y = 4a²(2ay) Sometimes shortened to witch
Word Origin
C19: named after Maria Gaetana Agnesi (1718–99), Italian mathematician and philosopher; probably so called from the resemblance of the curve to the outline of a witch's hat
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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witch-agnesi in Science
witch of Agnesi
  (wĭch əv än-yā'zē)   
A planar cubic curve that is symmetric about the y-axis and that approaches the x-axis as an asymptote. Its equation is x2y = 4a2(2a - y), where a is a constant.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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13
13
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