witch of Agnesi

[ah-nyey-zee]

witch of A·gne·si

[ah-nyey-zee]
noun Geometry.
a plane curve symmetrical about the y-axis and asymptotic to the x-axis, given by the equation x2y=4a2(2ay).
Also called versiera.


Origin:
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. 2012.
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Witch of Agnesi has a plethora of syllables.
So is floccinaucinihilipilification. Does it mean:
an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language.
the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
Collins
World English Dictionary
witch of Agnesi (ɑːnˈjeɪzɪ)
 
n
maths Sometimes shortened to: witch a plane curve, symmetrical about the y-axis, having the equation x²y = 4a²(2a--y)
 
[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 10th Edition
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American Heritage
Science Dictionary
witch of Agnesi   (wĭch əv än-yā'zē)  Pronunciation Key 
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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