श्रैष्ठ्यśraiṣṭhyan. (fr. श्रेष्ठ) superiority, preeminence among (gen. or comp.) AV. &c. &c.
neuter gender (from श्रेष्ठ) superiority, preeminence among (genitive case or compound) AV. etc. etc.
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.