Xx
X
(1) one of the three CIE tristimulus values, the red primary; (2) spectral color
matching functions of the CIE Standard Observer used for calculating the X tristimulus
value; (3) one of the CIE chromaticity coordinates; (4) power of magnification;
(5) algebraic value.
x
(1) abbreviation for abscissa in mathmatics; (2) symbol for power of magnification.
X-25
an international standard protocol for connecting computers and other data
communication devices to packet switched networks.
X-Acto knife
a cutting tool used for cutting copy, film, paper and making materials.
x-axis
the horizonal line axis of a three dimensional coordinate system.
x-cordinate
the horizontal location of data on a graph, display monitor, or page layout.
xenon
colorless, orderless, gas used in a gas discharge lamp to produce white light.
xenon lamp
a light source containing xenon gas; usually operated as a pulsed light source,
as in a strobe lamp.
xerography
a copying process that utilizes a selenium surface and electrostatic faces
to form an image.
x-height
the height of the lowercase letters of a type face that do not have ascenders
or decenders.
x-line (mean line)
a line that marks the tops of lowercase letters without ascenders.
x-ray analysis
the passage of X-rays through a sample to obtain a pattern that can be compared
with a known pattern for identification of sample composition.
xylene (xylol)
any isomeric hydrocarbon of the benzene series C6H4(CH3)2 obtained
from wood and coal tar.
xylography
the process of wood engraving or producting a print from a wood engraving.
x-y-z-theta
a set of vectors referencing the possible directions for moving a screen into
register, X and Y are coordinates in the horizontal plane of the screen,
Z is a vertical coordinate perpendicular to the screen plane, and Theta is
an angular adjustment around the center point of the screen or platen.
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