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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
These indicators can range from elevated blood pressure and abnormal blood sugar to impaired mobility or poor sleep. — Khloe Quill, FOXNews.com, 13 Oct. 2026 But many people with diabetes (and some without) choose to wear a CGM, a device that monitors their blood sugar levels automatically. — Sukhman Rekhi, Verywell Health, 13 Oct. 2026 The researchers said the effects were not completely explained by weight loss, blood sugar control or inflammation. — Brenda Goodman, CNN Money, 13 Oct. 2026 While whole wheat toast offers fiber to slow digestion and lessen blood sugar spikes, white bread is a refined grain, which means most of the fiber is removed. — Trista Chan, HEALTH, 12 Oct. 2026 See All Example Sentences for blood sugar

Word History

First Known Use

1881, in the meaning defined above

Time Traveler
The first known use of blood sugar was in 1881

Browse Nearby Words

Cite this Entry

“Blood sugar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blood%20sugar. Accessed 20 Oct. 2026.

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)
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!