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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.

When transplanted into diabetic mice, the cells gradually restored the animals' ability to regulate blood sugar.

From Science Daily • May 6, 2026

A late-stage trial showed that oral semaglutide significantly reduced blood sugar in 10- to 17-year-olds.

From The Wall Street Journal • Apr. 28, 2026

A clinical trial for patients with Type 2 diabetes indicated Lilly’s pill was more effective at lowering blood sugar levels and weight reduction, though fewer people stayed on it.

From Barron's • Apr. 24, 2026

Both Foundayo and Wegovy mimic the GLP-1 hormone, which naturally occurs in the body, to suppress hunger and improve blood sugar levels.

From Barron's • Apr. 24, 2026

Aimee considered opting out by claiming low blood sugar from involuntary fasting, but she decided against starting out the year as the class hypochondriac.

From "Nine, Ten: A September 11 Story" by Nora Raleigh Baskin

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.