presidial[prĭ-sĭdˈē-əl] also pre·sid·i·ar·y [-ĕrˌē]
presidial definition by American Heritage Dictionary
Of, relating to, possessing, or being a garrison.
Variant of presidio
noun pl. presidios
a fortified place or military post, esp. in the SW U.S.
Origin: Spanish ; from Classical Latin praesidium, garrison ; from praeses, guard ; from praesidere: see preside