blood sugar

American  

noun

1. glucose in the blood.

2. the quantity or percentage of glucose in the blood.

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blood sugar British  

noun

1. med the glucose concentration in the blood: the normal fasting value is between 3.9 and 5.6 mmol/l

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blood sugar Scientific  

1. Sugar in the form of glucose in the blood. The concentration of blood sugar is measured in milligrams of glucose per 100 milliliters of blood.

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Etymology

Origin of blood sugar

First recorded in 1925–30

Example Sentences

Pediatric obesity specialists say they are seeing high blood pressure, poor blood sugar control and liver dysfunction in children as young as 4.

From The Wall Street Journal • Jun. 22, 2026

Their A1C, a measure of blood sugar, was elevated.

From The Wall Street Journal • Jun. 22, 2026

People with diabetes are about 60% more likely to develop dementia than those without, and frequent episodes of low blood sugar are linked to a 50% higher chance of cognitive decline.

From Science Daily • Jun. 17, 2026

High blood sugar impairs immune function and narrows vessels that carry oxygen-rich blood, making it harder for skin to heal.

From Los Angeles Times • Jun. 14, 2026

Confusion, panic, and incoherent speech are all symptoms of extremely high blood pressure and blood sugar, which can lead to heart attack and stroke.

From "The Immortal Life of Henrietta Lacks" by Rebecca Skloot

Related Words

• glucose