Lewis Short
orthostăta | orthrăgŏriscus, i (noun M.m) = ὀρθοστάτης: (that stands upright), in archit.
* The facing of a wall (pure Lat. frons), Vitr. 2, 8; 10, 19 fin.
(† , , , = ὀρθραγορίσκος, v. l. ap. Plin. 32, 2, 9, § 19, for orthagoriscus, q. v.)
Charlton T. Lewis, Charles Short, A Latin Dictionary