Does MySQL support user defined data types

Is it possible to define (alias) a base data type in MySQL?

Currently I would like to define UUID as char(32), and then use UUID as the type throughout the schema definition. As we're prototyping at the moment, UUID is very likely to change - I'd like to ensure that this change is reflected consistently throughout the schema.

I'm thinking something like:

alias type UUID char(32);

Thanks in advance!