| 单词 |
semi-cubical |
| 释义 |
semi-ˈcubical, a. Math. [semi- 7 b.] Applied to the curve of the third degree with a cusp referred to rectangular axes, the equation to which can always be reduced to the form ay2 = x3. The exponent of the power of the abscissa which is proportional to the ordinate is 3/2, whence the name.
1677Wallis in Rigaud Corr. Sci. Men (1841) II. 609 That [invention] of Mr. Neale is straightening the semi⁓cubical parabola without supposing the squaring an hyperbola. 1704J. Harris Lex. Techn. I, Semi-cubical Paraboloid, is a Curve whose Ordinates are in Subtriplicate of the Duplicate proportion of the Diameter. 1855G. Salmon Conic Sect. xiii. (ed. 3) §251 The equation of the evolute of a parabola represents a curve called the semicubical parabola. |

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