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

He is now doing well but his condition needs to be carefully managed – his diet must be closely watched and his blood sugar checked.

From BBC • Jun. 22, 2026

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

From The Wall Street Journal • Jun. 22, 2026

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

Four years after MLK launched an intensive management program for the most at-risk patients, more than 80% of enrollees have seen blood sugar levels decline.

From Los Angeles Times • Jun. 14, 2026

He told her she needed to educate herself, learn the warning signs, know how to bring down her blood pressure and control her blood sugar.

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

Related Words

• glucose