Digg.com posted a useful link to Printing definitions and glossary of terms:
Glossary of Printing Terms
This glossary of printing terms was created by people working in today's printing industry and is brought to you by the printers at printusa.com who provide free printing quotes. It has been
revised and edited to help the desktop publisher understand the printing trade by TentMaker Publishing.
We have rewritten some technical descriptions in every day language to help the non technical person....
Accordion fold: Bindery term, two or more parallel folds which open like an accordion.
Against the grain: At right angles to direction of paper grain.
Alteration: Change in copy of specifications after production has begun.
Artboard: Alternate term for mechanical art.
Author's corrections: Also know as "AC's". Changed and additions in copy after it has been typeset.
....
Work and turn: Printing one side of a sheet and turning it over from left to right ussing the same side guides and plate for the second side.
Wove paper: A paper having a uniform unlined surface with a smooth finish.
(Via Digg.com.)