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noun Geometry.
a curve having a cusp at the origin and a point of inflection at infinity. Equation: r = 2a sin(θ)tan(θ).
Related forms
cis·soi·dal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Cissoid
is always a great word to know.
So is callithumpian. Does it mean:
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| a fool or simpleton; ninny. |
Collins
World English Dictionary
| cissoid (ˈsɪsɔɪd) | |
| —n | |
| 1. | a geometric curve whose two branches meet in a cusp at the origin and are asymptotic to a line parallel to the y-axis. Its equation is y²(2a -- x)=x³ where 2a is the distance between the y-axis and this line |
| —adj | |
| 2. | Compare sistroid contained between the concave sides of two intersecting curves |
| [C17: from Greek kissoeidēs, literally: ivy-shaped, from kissos ivy] | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
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