Z

z-axis:
in geometry the axis of a coordinate system drawn at right angles to both the horizontal (x-axis) and vertical (y-axis) axes. The z-axis adds depth to 3-graphics.

z-height:
the height of a lowercase letter ‘z’. Also see x-height.

zig-zag folding:
folding used with continuous forms with alternating position (head and foot). Commonly used to convert roll paper to easily managed flat-back.

zip:
removable disk technology from Iomega that can store either 100, 250 or 750 megabytes of data on a disk that’s a little bigger than a three-and-a-half-inch floppy,or reffers to the compression algorithm that is used a lot on the Windows platform.

zoom:
the enlargement or reduction on a computer screen of an image, a page or any other object.

zymurgy:
this is the last word in my Longman dictionary. It refers to a branch of applied chemistry that deals with fermentation processes. Maybe this part of the dictionary could use some fermentation as well…