From an unused root probably meaning to inclose; the skin of a grape -- husk.
H2085. zag
זָג noun [masculine] name of some comparatively insignificant product of vine (הַיַּיִן גֶּפֶן), the eating of which was included in prohibition to Nazirite; skin of grape, so Thes (after Onk Mishna Maaser. 5:§ 4, Orla 1:§ 8, compare Sifre on the passage): יאֹכֵ֑ל לֹא וְעַדזָֿג֖ מֵחַרְצַנִּים Numbers 6:4 (Late Hebrew זוג זג,; so called as transparent ? compare Aramaic זְגוּגִיתָא glass, Late Hebrew זַגָּג glazier (Arabic glass, is a loan-word according to Frä64); compare theory of √ in LagGes. Ath. 41, Fll.c.: but in Hebrew glass is זְכוֺכִית).
זָדוֺן זֶד, see below זיד.