Meaning of y-axis

y-ax•is

Pronunciation: (wī'ak"sis), [key]
— pl. y-ax•es
  1. Also called(in a plane Cartesian coordinate system) the axis, usually vertical, along which the ordinate is measured and from which the abscissa is measured. See diag. under
  2. (in a three-dimensional Cartesian coordinate system) the axis along which values of y are measured and at which both x and z equal zero.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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