abscissae

A student plots the abscissae on a graph in math class.

Definition

1. Noun (plural of abscissa):
   • In mathematics, "abscissae" is the plural form of "abscissa," which refers to the horizontal coordinate (x-coordinate) of a point in a two-dimensional Cartesian coordinate system. It indicates the distance of a point from the vertical axis (y-axis) along the horizontal axis.
   • Example: In the point (3, 5), the abscissa is 3.

Usage Examples

• (The horizontal coordinates of the points are shown.)
• (The x-coordinates indicate the values of the independent variable.)

Advanced Usage

• "abscissae of intersection": the x-coordinates where two curves or lines meet.

  • The abscissae of intersection for the two functions were calculated to be 2 and -1. (The x-values where the graphs cross.)

• "set of abscissae": a collection of x-coordinates used in mathematical analysis or data plotting.

  • The set of abscissae for the experiment ranged from 0 to 10. (The x-values used in the study.)

Variants and Related Words

• Abscissa (n, singular): the x-coordinate of a point.
  • The abscissa of the point is 4. (The horizontal coordinate.)
• Ordinate (n): the vertical coordinate (y-coordinate) in a Cartesian system.
  • The point (2, 7) has an ordinate of 7. (The y-coordinate.)
• Coordinate (n): either of two numbers (x and y) that define the position of a point.
  • The coordinates of the point are (5, -3). (The x and y values.)

Synonyms

• x-coordinate: the horizontal position of a point.
  • The x-coordinate of the point is 3. (Equivalent to abscissa.)
• Horizontal coordinate: the value along the x-axis.
  • The horizontal coordinate is negative for points to the left of the origin. (Same as abscissa.)

Related Idioms

• (No common idioms directly involve "abscissae," as it is a technical mathematical term.)

Phrasal Verbs

• (No phrasal verbs are associated with "abscissae," as it is a noun with no verbal usage.)