V2EX abscissa

Abscissa

释义 Definition

(数学)横坐标:在直角坐标系中表示点在 x 轴方向位置的数值(即点的 x 值)。在更广义的坐标系统里,也可指沿某一基准线测量的坐标分量。

发音 Pronunciation

/bss/

例句 Examples

The abscissa of the point (3, 5) is 3.
点 (3, 5) 的横坐标是 3。

When you plot the data, use the abscissa to represent time and the ordinate to represent temperature changes.
当你绘制数据时,用横坐标表示时间,用纵坐标表示温度变化。

词源 Etymology

abscissa 来自拉丁语 *abscissa (linea)*,意为“(被)截下来的(线)”,源自动词 abscindere(切断、截去)。早期解析几何中,它指从坐标轴上“截取”的线段长度,后来固定用来表示点的横向坐标值(即 x 坐标)。

相关词 Related Words

文学与著作 Literary Works

  • René Descartes, La Géométrie(《几何学》):解析几何传统中常见“横坐标/纵坐标”对应术语的使用语境。
  • Charles H. Lehmann, Analytic Geometry(《解析几何》):以坐标作图与曲线方程讲解中频繁出现 abscissa
  • G. B. Thomas, Thomas’ Calculus(《托马斯微积分》):函数图像、坐标系与曲线讨论中常用该词。
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