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 अल्ला
अल्लाallā(Ety. ?)
(Etymology ?)
A mother (Vocativeअल्ल) अम्बार्थनद्यो- र्ह्रस्वःParasmaipadaVII.3.17.