Noun
(medicine, American spelling) Presence of glucose in the blood (which is always true), and (usually, more specifically) average concentration thereof over time, and its regulation; in this sense, glycemia is hypernymic to euglycemia, hyperglycemia, and hypoglycemia, and a mention of glycemia is a reference to blood sugar regulation and degree or quality thereof.
(medicine, American spelling) (occasionally, ambiguously) Hyperglycemia.
Source: en.wiktionary.org