hemoglobin A1c

noun

Definition of hemoglobin A1c

: a stable glycoprotein formed when glucose binds to hemoglobin A in the blood Blood sugar was assessed by measuring the amount of hemoglobin A1c in the participants' blood, a test that looks for hemoglobin with sugar attached to it.— Gina Kolata also : a test that measures the level of hemoglobin A1c in the blood as a means of determining the average blood sugar concentrations for the preceding two to three months

Note: Both the glycoprotein and the test are also called A1c, glycated hemoglobin, glycohemoglobin, glycosylated hemoglobin, HA1c, and HbA1c.

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The first known use of hemoglobin A1c was in 1964

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hemoglobin A1c

noun

\-ˌā-ˌwən-ˈsē\

Medical Definition of hemoglobin A1c

: a stable glycoprotein formed when glucose binds to hemoglobin A in the blood Blood sugar was assessed by measuring the amount of hemoglobin A1c in the participants' blood, a test that looks for hemoglobin with sugar attached to it.— Gina Kolata, The New York Times, 22 Dec. 2005 also : a test that measures the level of hemoglobin A1c in the blood as a means of determining the average blood sugar concentrations for the preceding two to three months