diabetic

Of or pertaining to diabetes, especially diabetes mellitus.

diabetic complications

the diabetic foot

Having diabetes, especially diabetes mellitus.

diabetic patients (patients with diabetes)

He turned diabetic in his thirties.

Suitable for one having diabetes, especially diabetes mellitus.

diabetic socks

I also have learned to slip a couple of my diabetic cookies in my purse […] and take them along with me when we are invited out for afternoon coffee.

A person with diabetes, usually diabetes mellitus.