blood sugar

noun

: the glucose in the blood

also : its concentration (as in milligrams per 100 milliliters)

Examples of blood sugar in a Sentence

As a diabetic, he needs his blood sugar to stay at the right levels.

Recent Examples on the Web

Use a low-sugar diet to help reduce blood sugar spikes while still allowing healthy carbohydrate-rich foods. — Jillian Kubala, HEALTH, 17 Sep. 2026

Complex carbs with fiber slow digestion and sugar absorption, while protein and fat further delay digestion, helping to stabilize blood sugar. — Mira Miller, Verywell Health, 17 Sep. 2026

There is no routine screening test, as there is for breast cancer or colon cancer, and most diagnoses happen only at advanced stages, when symptoms such as weight loss, abdominal pain and blood sugar problems become unignorable. — Claire Cameron, Scientific American, 16 Sep. 2026

His blood sugar and blood pressure were critically low, so he was taken to Tallahassee Memorial Hospital and transferred to HCA Jacksonville Memorial Hospital. — Grethel Aguila, Miami Herald, 16 Sep. 2026

Word History

First Known Use

1881, in the meaning defined above

Kids Definition

blood sugar

noun

: the glucose in the blood

especially : the amount or percentage of such sugar

Medical Definition

blood sugar

noun

: the glucose in the blood

also : its concentration (as in milligrams per 100 milliliters)