*stunned silence* Okay, let's just roll that one in our minds now.
Take your time. It'll come to you. Aaaany moment now...
From Merriam-Webster Online:
Main Entry: pos·se
Pronunciation: 'pä-sE
Function: noun
Etymology: Medieval Latin posse comitatus, literally, power or authority of the county
1 : a large group often with a common interest
2 : a body of persons summoned by a sheriff to assist in preserving the public peace usually in an emergency
3 : a group of people temporarily organized to make a search (as for a lost child)