Definition: the reputed authoritative work on the Paribhasas in the system of Paanini's grammar written by Nagesabhatta in the beginning of the 18th century A.D. at Benares. The work is studied very widely and has got more than 25 commentaries written by pupils in the spiritual line of Nagesa. Well-known among these commentaries are those written by Vaidyanatha Payagunde (called गदा), by BhairavamiSra (called मिश्री), by Raghavendraacaarya Gajendragadakara (called त्रिपथगा), by Govindacarya Astaputre of Poona in the beginning of the nineteenth century (called भावार्थदीपिका), by BhaskaraSastri Abhyankar of Satara (called भास्करी), and by M. M. Vaasudevasaastri Abhyankar of Poona (called तत्त्वादर्श). Besides these, there are commentaries written by Taatya Sastri Patawardhana,Ganapati Sastri Mokaate, Jayadeva Misra, VisnuSastri Bhat, Vishwanatha Dandibhatta, Harinaatha Dwiwedi Gopaalacarya Karhaadkar, Harishastri Bhagawata, Govinda Shastri Bharadwaja, Naarayana Shastri Galagali, Venumaadhava Shukla, Brahmaananda Saraswati, ManisiSeSaSarma,Manyudeva, Samkarabhatta, Indirapati, Bhimacarya Galagali, Madhavacarya Waikaar, Cidrupasraya, Bhimabhatta, LakSminrsimha and a few others. Some of these works are named by their authors as Tikaas, others as Vyaakhyaas and still others as Tippanis or Vivrtis.