arrow or razor grass, a sacred or sacrificial grass, ඉළුක්. It is said that on the occasion the Buddha attained his Buddhahood a handful of this grass being presented to him, he threw it on the ground under a Bo-tree and it at once became a seat for him.
Carter, Charles. A Sinhalese-English dictionary. Colombo: The "Ceylon Observer" Printing Works; London: Probsthain & Co., 1924.