Ice-nine (disambiguation)

Ice-nine is a fictional solid polymorph of water from Kurt Vonnegut's novel, Cat's Cradle.

Ice-nine may also refer to:

• Ice IX, a form of solid water stable at temperatures below 140 K
• Ice Nine (video game), a first-person shooter video game for the Game Boy Advance
• ICE-9, a fictional computer virus in the American science fiction crime drama television series Person of Interest