| 单词 | conchoid |
| 释义 | conchoid[ kong-koid ] / ˈkɒŋ kɔɪd / noun Geometry.a plane curve such that if a straight line is drawn from a certain fixed point, called the pole of the curve, to the curve, the part of the line intersected between the curve and its asymptote is always equal to a fixed distance. Equation: r = b ± a sec(θ). Origin of conchoidFrom the Greek word konchoeidḗs, dating back to 1790–1800. See conch, -oid Words nearby conchoidconchiolin, Conchita, conchitis, concho-, Conchobar, conchoid, conchoidal, conchology, Conchos, conchy, concierge Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for conchoid
British Dictionary definitions for conchoidconchoid / (ˈkɒŋkɔɪd) / noungeometry a plane curve consisting of two branches situated about a line to which they are asymptotic, so that a line from a fixed point (the pole) intersecting both branches is of constant length between asymptote and either branch. Equation: (x – a)²(x ² + y ²) = b ² x ² where a is the distance between the pole and a vertical asymptote and b is the length of the constant segment 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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