= cusp, n., in various senses.
| 单词 | θ115671 |
| 释义 | the world > relative properties > number > geometry > point > [noun] > of intersection or contact > of specific lines or curves (16) cuspis1646 = cusp, n., in various senses. focus1656 Geometry. A fixed point relative to which a given curve can be defined by means of a relation governing the distances between that point and each… point of reflection1674 a point at which something returns or reverses its path; spec. (a) Optics a point at which a ray is reflected; †(b) Geometry = cusp, n. 4; cf. point… umbilicus1704 Geometry. A focus. Obsolete. cuspid1743 Geometry. = cusp, n. 4. Obsolete. cusp1758 Geometry. A point at which two branches of a curve meet and stop, with a common tangent; or at which the moving point describing the curve has its… rhamphoid1814 A rhamphoid cusp. Obsolete. biplanar1849 Lying or situated in two tangent planes. Also n., a biplanar node. oscnode1852 A node of a plane curve at which three branches meet, two of which have a common tangent there. tacnode1852 A point at which two parts of the same curve have ordinary contact. tangential of a point1858 Geometry. tangential of a point (in a curve of the third or higher order), the point at which a tangent at the given point meets the curve again. cnicnode1869 A conical point, a point where tangents form a cone of the second order. uniplane1869 Mathematics. The plane or line formed by the coincident tangents of a uniplanar node; the plane formed by coincident planes. Now rare. unode1869 A double point having the property that all the tangents at that point coincide so as to form a single line. Subcategories:— at infinity (2) |
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