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Synonyms

blood sugar

American  

noun

  1. glucose in the blood.

  2. the quantity or percentage of glucose in the blood.

blood sugar British  

noun

  1. med the glucose concentration in the blood: the normal fasting value is between 3.9 and 5.6 mmol/l

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
blood sugar Scientific  

  1. Sugar in the form of glucose in the blood. The concentration of blood sugar is measured in milligrams of glucose per 100 milliliters of blood.

Etymology

Origin of blood sugar

First recorded in 1925–30

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Volunteers who tried it had better sleep, lower blood pressure and healthier blood sugar levels overall.

From BBC • Apr. 14, 2026

One issue for patients with the disease is that they struggle to maintain healthy blood pressure and blood sugar.

From MarketWatch • Apr. 6, 2026

Novo was hoping to achieve better weight loss and blood sugar control by combining drugs that work through different pathways.

From Barron's • Apr. 1, 2026

They found that metformin's ability to reduce blood sugar at clinically relevant doses relies on suppressing Rap1 activity in this specific area of the brain.

From Science Daily • Mar. 25, 2026

“People get dizzy for so many reasons. He could have gotten up too quickly. Or maybe his blood sugar dropped.”

From "Amina's Song" by Hena Khan

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.