One strong possibility: rearranges to "Prism Uraniso" or more recognizably, "Prism Uranus io" — but that doesn’t quite fit.
It looks like the phrase is likely a typo, transposition, or anagram. prism osuinra
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). One strong possibility: rearranges to "Prism Uraniso" or
So probably intended to be "Prism Uranios" or "Prism Ouranios" (Heavenly Prism). prism osuinra