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 रेणु
रेणुreṇum., f. [रीयतेः णुः नित् Uṇ.3.38]
, Feminineरीयतेः णुः नित् Uṇ.3.38
Dust, an atom of dust, sand etc.; तुरगखुरहतस्तथा हि रेणुः Ś.1.32.