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 वपा
वपाvapāFat, marrow; Y.3.94.
[वप्-अच्]
Fat, marrow; Y.3.94.
A hole, cavity; वल्मीकस्य वपायां च Mb.13.85.49.
A mound of earth thrown up by ants.
The skin of the intestines; अगस्त्यस्याभिचारेण युष्माकं च वपा हुता Mb.1.118. 15.