From an unused root apparently meaning to deepen or hollow (like kad); a log or measure for liquids -- log (of oil).
see HEBREW kad
H3849. log
לֹג noun masculineLeviticus 14:10 a liquid measure (Late Hebrew id.; Aramaic לוּגָּה; also , a (dessert -;) dish, etc.; meaning of √ dubious; Thes compare Arabic be deep, depth, abyss); — ׳ל absolute 14:10; construct 14:12 3t. Leviticus 14; always of oil (שֶׁמֶן) 14:10, 12, 15, 21, 24 (P; all in law of purification of leper); according to Talmud = 1/12 hin (see הִין above; ZuckermannJüd. Mass. system, 49) i.e. approximately 1/2 litre; BenzArchaeology 182, 184 NowArchaeology i. 204f.