posse comitatus

pos·se co·mi·ta·tus

[pos-ee kom-i-tah-tuhs, -tey-]
noun
1.
the body of persons that a peace officer of a county is empowered to call upon for assistance in preserving the peace, making arrests, and serving writs.
2.
a body of persons so called into service.

Origin:
1620–30; < Medieval Latin: posse of the county

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Collins
World English Dictionary
posse comitatus (ˌkɒmɪˈtɑːtəs) [Click for IPA pronunciation guide]
 
n
the formal legal term for posse
 
[Medieval Latin: strength (manpower) of the county]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Posse comitatus is always a great word to know.
So is bezoar. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a stew of meat, vegetables, potatoes, etc.
Encyclopedia Britannica
Encyclopedia

posse comitatus

ancient English institution consisting of the shire's force of able-bodied private citizens summoned to assist in maintaining public order. Originally raised and commanded by the sheriff, the posse comitatus became a purely civil instrument as the office of sheriff later lost its military functions. From time to time, legislation gave authority to other peace officers and magistrates to call upon the power of the county.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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