January 28 2013 Medical Monday: Supine Supine means “lying on the back.” Machine Brief: supine= SAOU/PAOIN Tags: Briefs, Medical Monday, Vocabulary For Dictionary Building Copyright 2018. All rights reserved. Posted January 28, 2013 by Elsie Villega in category "Briefs", "Medical Post navigation Practice Video: As A Man Thinketh Part 2 Legal Vocabulary: Appellate vs Appellant