abbreviation for Yttrium, Aluminium, Garnet. This term usually refers to an infrared laser with a wavelength of 1064 nm. In fact it should be Nd (neodymium) YAG but Nd is usually omitted. The name describes components of the synthetic gemstone used in the laser.
rotational motion about the z axis, also known as azimuth or P.
color space that defines colours using luminance (Y) and two levels of chrominance (C and C)
the subtractive primary color that appears yellow and absorbs blue light. or one of the four-color process inks, made from the organic pigment diarylide yellow, formerly called benzidine yellow.
yellowing: in reference to paper it describes a transformation inherent to all vegetable fibers which is caused by exposure to elements such as heat, light and moisture

yield value:
the actual amount of force needed to start an ink flowing.
abbreviation for yellow, magenta, cyan and key