| 单词 | cissoid |
| 释义 | cissoid[ sis-oid ] / ˈsɪs ɔɪd / noun Geometry.a curve having a cusp at the origin and a point of inflection at infinity. Equation: r = 2a sin(θ)tan(θ). Origin of cissoid1650–60; <Greek kissoeidḗs, equivalent to kiss(ós) ivy + -oeidēs-oid OTHER WORDS FROM cissoidcis·soi·dal, adjectiveWords nearby cissoidcis person, cisplatin, cisplatinum, cissexual, cissing, cissoid, cissus, Cissy, cist, cistaceous, Cistercian Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for cissoidcissoid / (ˈsɪsɔɪd) / nouna 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 y ²(2a – x) =x ³ where 2a is the distance between the y -axis and this line adjectivecontained between the concave sides of two intersecting curvesCompare sistroid Word Origin for cissoidC17: from Greek kissoeidēs, literally: ivy-shaped, from kissos ivy 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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