The term "hexa" has different meanings depending on the context. Here are some of them:

• Prefix meaning six: "Hexa-" is a prefix used in the formation of compound words that means "six". For example, "hexagon" is a six-sided figure.

• HEXA gene: The HEXA gene provides instructions for making one part of an enzyme called beta-hexosaminidase A, which is involved in breaking down certain molecules in the body. Mutations in this gene can cause Tay-Sachs disease, a fatal genetic disorder.

In summary, "hexa" can refer to the number six or to a gene involved in a metabolic process.