presidiary

pre·sid·i·al

 (prĭ-sĭd′ē-əl) also pre·sid·i·ar·y (-ĕr′ē)

adj.

Of, relating to, possessing, or being a garrison.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.