I don't think we have one here, but try
http://www.linns.com/reference/terms/terms.aspxIf Linn's doesn't work, try (the not-quite-as-good)
http://www.stamp2.com/library/abbreviate.aspLastly, don't be afraid to ask -- no one will bark at you. We all had to learn them once upon a time. Like any profession or avocation, Stamping has it's own jargon. You'll catch on quickly, I'm sure.
Kirk