Chapter 15 (Diagnostic Procedures) Al = pertaining to Anti = against Cutane = skin Derm = skin Ic = pertaining to Lingu = tongue Ology = study of Ours = pertaining to Pharmacy = drug Pryet = fever Sub = under Trans = across Frequently used drug administration abbreviations: ac = before meals pc = after meals NPO = nothing by mouth po = by mouth PRN = as needed qh = every hour qd = every day qhs = every night bid = twice a day tid = three times a day qid = four times a day qod = every other day Rx = prescription Dx = diagnosis Tx = treatment Hx = history