Sanskrit

Noun

रेणु • ‎(reṇu) m

1. dust, a grain or atom of dust, sand &c. RV. &c.
2. the pollen of flowers MBh. Kāv. &c.
3. powder of anything Ṡiṡ.
4. Oldenlandia herbacea L.

References

• Sir Monier Monier-Williams (1898) A Sanskrit-English dictionary etymologically and philologically arranged with special reference to cognate Indo-European languages, Oxford: Clarendon Press, page 0887