1) Erect 2) Upright 3) Vertical 1) Erect 
(ortho- + Gr. statikos causing to stand) pertaining to or caused by standing erect.
<anatomy> Pertaining to or caused by standing erect. ... Origin: Gr. Statikos = causing to stand ... (18 Nov 1997) ... 
(or″tho-stat´ik) pertaining to or caused by standing erect; see also orthostatic hypotension.
Type: Term Pronunciation: ōr′thō-stat′ik Definitions: 1. Relating to an erect posture or position.
[adj] - pertaining to an upright standing posture
orthostatic 1. Of or relating to an upright standing position. 2. Concerning or caused by an erect position.
adjective pertaining to an upright standing posture; `orthostatic hypotension`
relating to or caused by erect posture.