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Though the word "abscissa" (Latin "linea abscissa", "a line cut off") has been used at least since De Practica Geometrie published in 1220 by Fibonacci (Leonardo of Pisa), its use in its modern sense may be due to Venetian mathematician Stefano degli Angeli in his work Miscellaneum Hyperbolicum, et Parabolicum of 1659. The ordinate of a point is the signed measure of its projection on the secondary axis, whose absolute value is the distance between the projection and the origin of the axis, and whose sign is given by the location on the projection relative to the origin (before: negative after: positive). The abscissa of a point is the signed measure of its projection on the primary axis, whose absolute value is the distance between the projection and the origin of the axis, and whose sign is given by the location on the projection relative to the origin (before: negative after: positive). An ordered pair consists of two terms-the abscissa (horizontal, usually x) and the ordinate (vertical, usually y)-which define the location of a point in two-dimensional rectangular space: Usually these are the horizontal and vertical coordinates of a point in a two-dimensional rectangular Cartesian coordinate system. ə/ plural abscissae or abscissas) and the ordinate are respectively the first and second coordinate of a point in a coordinate system: abscissa In mathematics, the abscissa ( / æ b ˈ s ɪ s. The distance of a point from y-axis scaled with the x-axis is called abscissa or x coordinate of the point. An ordered pair is used to denote a point in the Cartesian plane and the first coordinate (x), in the plane, is called the abscissa. The distance of a point from x-axis scaled with the y-axis is called ordinate.įor example, if (x, y) is an ordered pair, then y is the ordinate here. The distance of a point from the y-axis, scaled with the x-axis, is called abscissa or x coordinate of the point. In common usage, the abscissa refers to the horizontal ( x) axis and the ordinate refers to the vertical ( y) axis of a standard two-dimensional graph. The first value in each of these signed ordered pairs is the abscissa of the corresponding point, and the second value is its ordinate.

Spectral abscissa In mathematics, the spectral abscissa of a matrix or a bounded linear operator is the supremum among the real part of the elements in its spectrum, sometimes denoted asIllustration of a Cartesian coordinate plane, showing the absolute values (unsigned dotted line lengths) of the coordinates of the points (2, 3), (0, 0), (–3, 1), and (–1.5, –2.5).

Abscissa and ordinate In common usage, the abscissa refers to the horizontal (x) axis and the ordinate refers to the vertical (y) axis of a standard two-dimensional graph.

1690Įxamples from YouTube videos Articles from Wikipedia past participle of abscindere "to cut off," from ab- "off, away" (see ab-) + scindere "to cut" (see shed (v.)).

1690s, from Latin abscissa (linea) "(a line) cut off," from fem.

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the value of a coordinate on the horizontal axis noun … ☝️ Source: WordNet 3.0 (view on ).

noun … ☝️ Source: The GNU version of the Collaborative International Dictionary of English (view on )

One of the elements of reference by which a point, as of a curve, is referred to a system of fixed rectilineal coördinate axes.

noun … ☝️ Source: The Century Dictionary (view on ) In the system of Cartesian coördinates, a certain line used in determining the position of a point in a plane. 1), in the parabola PAC, AM, the part of the axis AB cut off by the ordinate PM, is the abscissa of the point P.

In mathematics: In the conic sections, that part of a transverse axis which lies between its vertex and a perpendicular ordinate to it from a given point of the conic.

noun … ☝️ Source: The American Heritage Dictionary of the English Language, 5th Edition (view on ) The coordinate representing the position of a point along a line perpendicular to the y-axis in a plane Cartesian coordinate system.