Now beings the enquiry into (the nature and scope of) Dravyaguna (a division of Ayurveda). Dravyaguna deals with the study of properties, actions and uses of dravyas (dietary substances as well as drugs). The word 'guna' in 'Dravyaguna' denotes characters in general and as such (is not restricted technically to qualities only but) incorporates action etc. as well. Here 'Rasadi' denotes rasa, vipaka, virya and prabhava while 'Karmadi' denotes samyoga, prayoga and ...
