Dictionary.com
Thesaurus.com
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.

See Examples For:

Lifestyle factors — such as diet, sleep, regular exercise, managing blood pressure and blood sugar, avoiding tobacco and alcohol — can reduce the risk of dementia by up to 45%, Tan said.

From MarketWatch Aug. 17, 2026

They then monitored food consumption, body weight, fat mass, blood sugar control and brain activity.

From Science Daily Aug. 15, 2026

Medical practices collect their payments in full only when their patients’ blood pressure or blood sugar actually improves.

From The Wall Street Journal Aug. 14, 2026

Only 7% of American adults have healthy blood pressure, blood sugar, cholesterol and weight.

From The Wall Street Journal Aug. 14, 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

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training