V. S. Apte, The Practical Sanskrit–English Dictionary. Look up any word of the Gita in Devanagari, IAST or Harvard-Kyoto, or browse the headwords letter by letter.
Entry वल्ल
वल्लvallaCovering.
[वल्ल् घञ्]
Covering.
A weight of three Gunjās.
Another weight of one Gunjā and a half; or of two Gunjās (in medicine).