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 nutrient plays a critical role in digestive health, blood sugar and cholesterol regulation, and maintaining a healthy gut microbiome. — Taylor Nicioli, CNN Money, 4 Sep. 2026

In another study, mixing in lentils with rice or instant potatoes resulted in lower blood sugar than eating the rice or potatoes alone. — Cristina Mutchler, Verywell Health, 4 Sep. 2026

This can lead to numerous health problems, including low blood sugar, fragile bones, traumatic injuries, congenital heart, airway and eye problems and even hydrocephalus, where excess fluid puts pressure on their brain. — Maddie Rhodes, USA Today, 3 Sep. 2026

Not only that, but semaglutide outperformed dieting in terms of maintaining memory and keeping blood sugar in check. — Jacek Krywko, Scientific American, 2 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)