Do they mean Disabled Students Allowance (DSA)? This is designed to give you adjustments and equipment which attempt to iron out any particular problems you might have with uni life and studying.
There are no specific disability scholarships/bursaries that I know of. If you're from a low income household, many universities will automatically give you a bursary. You need to have ticked the box on your Student Finance application, which allows them to share your financial information with other organisations.