[awr-dn-it, -eyt]
Mathematics. (in plane Cartesian coordinates) the y-coordinate of a point: its distance from the x-axis measured parallel to the y-axis.
Compare abscissa.

1670–80; extracted from Neo-Latin (līnea) ordināte (applicāta) (line applied) in order; ordināte (adv.), derivative of Latin ordinātus arranged. See ordination

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World English Dictionary
ordinate (ˈɔːdɪnɪt)
Compare abscissa See also Cartesian coordinates the vertical or y-coordinate of a point in a two-dimensional system of Cartesian coordinates
[C16: from New Latin phrase (linea) ordināte (applicāta) (line applied) in an orderly manner, from ordināre to arrange in order]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

late 14c., from L. ordinatus, pp. of ordinare arrange (see ordain). The verb is recorded from 1560s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

ordinate or·di·nate (ôr'dn-ĭt, -āt')
The plane Cartesian coordinate representing the distance from a specified point to the x-axis, measured parallel to the y-axis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
ordinate   (ôr'dn-ĭt)  Pronunciation Key 
The distance of a point from the x-axis on a graph in the Cartesian coordinate system. It is measured parallel to the y-axis. For example, a point having coordinates (2,3) has 3 as its ordinate. Compare abscissa.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Computing Dictionary

ordinate definition

The y-coordinate on an (x,y) graph; the output of a function plotted against its input.
x is the "abscissa".
See Cartesian coordinates.

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
It is important to co-ordinate these with equally magnanimous discoveries in
The survey also contained devastating news for those publishers hoping to
  co-ordinate attempts to charge.
He is also taking further steps to reinforce his power to direct and
  co-ordinate government.
And someone has to co-ordinate the multinationals' local service-providers, be
  they auditors or patent lawyers.
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