דְּיוֺ noun masculine ink (Late Hebrew id., Aramaic דְּיוּתָא ; Arabic inkbottle, inkhorn; Ges-Dietr Fl NHWB^{i. 41 derived} from √ דוה in assumed sense of slowly flowing; Fl compare Arabic thin skin on surface of milk, compare also Ol^{§ 178 g}), וַאֲנִי כֹּתֵב עַלהַֿסֵּפֶר בַּדְּי֑וֺ Jeremiah 36:18, compare Lag^{Ges. Abh. 216}. — On erasable quality of Hebrew ink compare RS^{OTJC, 400 f.} ed. 2, 71; see further L. Löw^{Graphische Requisiten etc. bel den Juden, 1870, i. 145 ff}.