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

The review points out a hormone known as fibroblast growth factor 21, which rises when protein intake is reduced, to boost energy, blood sugar control and reduce inflammation. — Antonio Pequeño Iv, Forbes.com, 31 July 2026

Eating zucchini can help support your heart health and regulate your blood sugar levels. — Chelsea Rae Bourgeois, Health, 30 July 2026

The tests measure blood sugar differently, and UCLA Health notes that women may be more likely than men to experience impaired glucose tolerance after eating — something a fasting test may not capture. — Emily Cegielski, Flow Space, 29 July 2026

Other markers of metabolic health include blood sugar and triglyceride levels. — Elise M. Brett, EverydayHealth.com, 29 July 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)