hyperglycaemia

n. (Medicine) abnormally high level of blood sugar (associated with diabetes)

Hyperglycemia, hyperglycaemia, or high blood sugar is a condition in which an excessive amount of glucose circulates in the blood plasma. The origin of the term is Greek: hyper-, meaning excessive; -glyc-, meaning sweet; and -emia, meaning "of the blood".
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Hyperglycemia /hy·per·gly·ce·mia/ abnormally increased content of glucose in the blood. hy·per·gly·ce·mi·a n. [more]Hyperglycaemia - Community and Resources

Noun
1. abnormally high blood sugar usually associated with diabetes
(synonym) hyperglycemia
(hypernym) symptom

A greater than normal concentration of glucose in the blood, most frequently associated with diabetes mellitus.