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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.

Their A1C, a measure of blood sugar, was elevated.

From The Wall Street Journal • Jun. 22, 2026

Pediatric obesity specialists say they are seeing high blood pressure, poor blood sugar control and liver dysfunction in children as young as 4.

From The Wall Street Journal • Jun. 22, 2026

These reduce blood sugar, improve insulin sensitivity and reduce inflammation.

From Science Daily • Jun. 17, 2026

This method delivers insulin straight to the brain while reducing effects on blood sugar.

From Science Daily • Jun. 17, 2026

“If he doesn’t take his medication like he is supposed to, he will! Checking his blood sugar, eating a balanced diet—he doesn’t want to do any of this!”

From "When Dimple Met Rishi" by Sandhya Menon

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