Sentence:  Graced by nurses (art's nurse highly grac'd him) / Who fed him with pure marrow of the Muses; / And when he list, with moisture to refresh him, / He drunke cleare Helicon: cleare from abuses, / He bent his mind to pure <WSD>Vranian</WSD> vses, / Vranianie him did to heau'n vpreare: / And made to man, him demi-god appeare. 
Meaning of the word marked with <WSD> tags:  Relating to Urania, the Muse of astronomy.