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 अङ्कस्
अङ्कस्aṅkasn.A mark.
[अञ्च्-असुन् कुत्वम्]
A mark.
The body.
a curve or bend; पथामङ्कांस्यन्वापनीफणत् Rv.4.4.4.