1. 
   z axis
    movement towards and away from the camera is in z
   Found op http://www.animationpost.co.uk/doping/glossary.htm
   
   
2. 
   Z Axis
   Axis perpendicular to both X and Y axes.
   Found op http://www.diracdelta.co.uk/science/source/z/a/zaxis/source.html
   
   
3. 
   z-axis
   Conventionally, the vertical axis in any three-dimensional co-ordinate system.
   Found op http://www.windmill.co.uk/glossary.html
   
   
4. 
   z-axis
   [n] - the third axis in a 3-dimensional coordinate system
   Found op http://www.webdictionary.co.uk/definition.php?query=z-axis
   
   
5. 
   Z-Axis
   The vertical or up & down movement of the engraving spindle.
   Found op http://www.britishprint.com/tw/glossary.asp?action=disp_lett&letter=s_a&pag
   
   
6. 
   Z-Axis
   An imaginary line at right angles to the X and Y axes. Usually the same as the vertical axis. This IS the all important third axis in a 3-dimensional coordinate system.
   Found op http://www.quadrasol.co.uk/glossary.php
   
   
7. 
   Z-axis
   See x-axis.
   Found op http://www.komprex.com/Glossary/index.htm
   
   
8. 
   z-axis
   noun the third axis in a 3-dimensional coordinate system
   Found op http://wordnet.princeton.edu/perl/webwn?s=z-axis
   
   

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