posse com·i·ta·tus 
(kŏm′ĭ-tātəs)
(kŏm′ĭ-tātəs)n.
See posse.
[Medieval Latin posse comitātūs : Medieval Latin posse, power, body of men (from Latin, to be able; see POTENT) + comitātūs, genitive of comitātus, county, territory of a count; see COUNTY.]