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

This can help reduce rapid changes in blood sugar levels during the night. — Sarah Jividen, Verywell Health, 8 Oct. 2026

Intoxicated infants can experience low blood sugar and dehydration as alcohol impacts their ability to feed, the hospital said. — Sacbee.com, 8 Oct. 2026

Compared to offspring born to sedentary parents, parental exercise granted protection against poor blood sugar levels and excess weight gain for an entire year after birth. — Diego Hernandez-Saavedra, The Conversation, 7 Oct. 2026

There seem to be many benefits to taking them, from blood sugar control to addiction management, to heart and kidney health. — Jill Collins, Forbes.com, 5 Oct. 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)