blood sugar

American  

noun

1. glucose in the blood.

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

---

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

---

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.

---

Etymology

Origin of blood sugar

First recorded in 1925–30

Example Sentences

See Examples For:

blood sugar

I was also told to avoid white bread, crackers, pasta and rice—what the dietitian called “fiber-stripped carbs”—because they could send my blood sugar soaring and then crashing.

From The Wall Street Journal ● Oct. 2, 2026

Clinicians therefore tend to focus on treating underlying conditions and recommending lifestyle changes, including weight loss and better blood sugar control.

From Science Daily ● Sep. 28, 2026

They said their blood sugar readings were refractory, meaning they kept coming back despite being given glucose, whereas naturally-occurring hypoglycemia can be easily corrected with a treatment such as a sugary drink.

From BBC ● Sep. 25, 2026

Doctors took blood samples to find out what caused her blood sugar to drop so low.

From BBC ● Sep. 25, 2026

But his reducing, combined with the blunt-instrument character of diabetes treatment in the 1930s, made controlling his blood sugar extremely difficult.

From "Seabiscuit: An American Legend" by Laura Hillenbrand

Related Words

• glucose