| 单词 | conchoid |
| 释义 | conchoid /kong"koyd/, n. Geom. 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(t). [1790-1800; < Gk konchoeidés. See CONCH, -OID] |
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