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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.

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

Novo Nordisk will seek regulatory approval for its semaglutide pill after a trial showed it reduced blood sugar in 10- to 17-year-olds.

From The Wall Street Journal • Apr. 23, 2026

Participants who took metformin needed about 12% less insulin than those in the placebo group to maintain stable blood sugar.

From Science Daily • Apr. 15, 2026

When Deborah got to her doctor’s office, her blood pressure and blood sugar were so high, her doctor was amazed she hadn’t had a stroke or heart attack while we were in Clover.

From "The Immortal Life of Henrietta Lacks" by Rebecca Skloot

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.