Logicalize

I made up a new word today while talking to someone on the phone - logicalize.  Actually I said "logicalizing" but what the hey.
At least I thought I made up a new word. According to the Urban Dictionary it means:

To think logically; to use reasoning, usually in a desperate situation

Here I am feeling all special and Urban Dictionary busts my bubble.  Does the Urban Dictionary count as an official dictionary? I guess that's like asking does Wikipedia count as an encyclopedia.