[wxwatcher]

The "Airman's Information Manual" (A.I.M.) has a Pilot/Controller Glossary in the back. It wil;l give you the meanings of most all ATC terms.

WILCO means Will Comply with your last instruction.

PAN-PAN-PAN is the international phrase for a "distress condition" needing immediate attention but is not an emergency.-

I don't know of any sites which have a complete listing of the ATC terms. If you run into one that you're not familiar with, most ATC personnel will "rephrase" the instruction in plain english. If you're reading a manual or just listening to a scanner and hear an unfamiliar term, your local airport fixed base operator or flight school may be able to help/ Otherwise, call 800-992-7433 (800-WX-BRIEF). That will put you in contact with the FAA Automated Flight Service Station in your area. Most specialists are more than happy to answer questions on "phraseology".

Jerry

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Comments and opinions are my own and do not reflect those of my employer.