| 单词 | conical section |
| 释义 | > as lemmasconical section (also conical line) conical point: a singular point on a surface at which the tangent lines form a cone. †conical section (also conical line): = conic adj. section (obsolete). conical projection: a method of projection (in maps, etc.) in which a part of a spherical surface is projected upon the surface of a tangent or secant cone which is then ‘developed’ or unrolled into a plane. conical perspective: that in which objects are delineated as if projected upon the surface of a vertical cone from a point in its axis, the surface being then unrolled into a plane. conical refraction: refraction in which a ray is converted into a hollow cone of light.extracted from conicaladj.< as lemmas |
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