अपूर्वकर्मन्apūrvakarmann. a religious rite or sacrifice (the power of which on the future is not before seen).
neuter gender a religious rite or sacrifice (the power of which on the future is not before seen).
कोशःDictionaries
Every entry for a word in Apte, Monier-Williams, Macdonell and the Dhātupāṭha, with their abbreviations spelled out, and an analysis of its forms.