The headword is the neuter singular nominative/accusative superlative form of the adjective (for the positive form see epsilon 3480), glossed with two substantive phrases. But the word occurs only in lexicography (here and in Hesychius). Richard Bentley (1662-1742) says that the superlative should be εὐηροτώτατον , but also that if the correction were made the entry would be out of alphabetical order.
For 'beauteousness' cf. kappa 230.