By Swami Harshananda
Upastaraṇa literally means ‘act of spreading’.
In some Vedic sacrifices, rice-cakes called puroḍāśa are used for offering into the consecrated fire. Ājya or ghee is spread below these puroḍāśa cakes before they are cut. This act of spreading is called upastaraṇa.
- Camasas means cups.
- The Concise Encyclopedia of Hinduism, Swami Harshananda, Ram Krishna Math, Bangalore