"Ix" can refer to different things depending on the context. Here are some possible meanings:

• Roman numeral: "Ix" is the Roman numeral for the number 9. It is obtained by subtracting 1 from 10 (X - I = 9).
• Clotting factor: "Ix" can also refer to factor IX, a clotting factor that activates factor VIII and whose deficiency is associated with hemophilia.
• Other uses: "Ix" may appear in the names of aristocracy as a suffix indicating the ninth. It can also be a name of a planet in Frank Herberts Dune, a fictional country in Queen Zixi of Ix by L. Frank Baum, or a nickname of Ford Prefect from the Hitchhikers Guide to the Galaxy by Douglas Adams.

In summary, "Ix" can mean different things depending on the context, such as a Roman numeral, a clotting factor, or a name of a planet or character in literature.