It looks like the phrase is likely a typo, transposition, or anagram.
Given the spelling "osuinra" – I notice + "io" / "oi" appears if rearranged: Letters in "osuinra" → U R A N I O S (exactly "Uranios" = “heavenly” in Greek, or a variant of Uranus). prism osuinra
So probably intended to be "Prism Uranios" or "Prism Ouranios" (Heavenly Prism). It looks like the phrase is likely a