Dictionaryab•scis•saPronunciation: (ab-sis'u), [key] —n., —pl. -scis•sas, -scis•saePronunciation: (-sis'ē). [key] Math. (in plane Cartesian coordinates) the x-coordinate of a point: its distance from the y-axis measured parallel to the x-axis. Cf. ordinate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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