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blood sugar

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

Origin of blood sugar

First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for blood sugar

blood sugar

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 in Medicine

blood sugar

n.
  1. glucose
  2. The concentration of glucose in the blood, measured in milligrams of glucose per 100 milliliters of blood.

blood sugar in Science

blood sugar

  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.