略語大辞典 [Med] 4 OSF oval specification value 楕円特性値. 楕円の長径と短径の比. 潰瘍の形の表現.oval specification value; a ratio ODL(oval long diameter)/ODS(oval short diameter); e.g of an ulcer; [Med]. 丸善「略語大辞典」JLogosID : 11881807