| 单词 | cardioid |
| 释义 | cardioid[ kahr-dee-oid ] / ˈkɑr diˌɔɪd / noun Mathematics.a somewhat heart-shaped curve, being the path of a point on a circle that rolls externally, without slipping, on another equal circle. Equation: r = a(1−cosA). Origin of cardioidFirst recorded in 1745–55, cardioid is from the Greek word kardioeidḗs heart-shaped. See cardi-, -oid Words nearby cardioidcardiogenic, cardiogenic shock, cardiogram, cardiograph, cardiohepatic, cardioid, cardioinhibitory, cardiokinetic, cardiokymogram, cardiokymograph, cardiolipin Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for cardioidcardioid / (ˈkɑːdɪˌɔɪd) / nouna heart-shaped curve generated by a fixed point on a circle as it rolls around another fixed circle of equal radius, a. Equation: r = a (1 – cos φ), where r is the radius vector and φ is the polar angle 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 Scientific definitions for cardioidcardioid [ kär′dē-oid′ ] A heart-shaped plane curve, the locus of a fixed point on a circle that rolls on the circumference of another circle with the same radius. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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