A1c

1 of 2

noun

ˌā-ˌwən-ˈsē How to pronounce A1c (audio)
: hemoglobin a1c
At least twice a year he has an A1c test, which shows how well his blood sugar levels have been controlled over a three-month period.—Anita Manning

A1C

2 of 2

abbreviation

variants or A/1C
airman first class

Examples of A1c in a Sentence

Recent Examples on the Web
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Noun
Your HbA1c Levels Could Decrease Hemoglobin A1c (HbA1c) measures your average blood sugar levels over three months. — Caitlin Beale, Health, 13 Mar. 2026 Supplements may slightly improve fasting blood sugar and A1c in some people. — Caitlin Beale, Health, 13 Mar. 2026 This includes colonoscopies that were never scheduled, A1c tests that were forgotten and statins that stayed on the pharmacy shelf. — Mika Newton, Forbes.com, 25 June 2025 This can be done either by a fasting or random blood glucose level, an A1c test, or an oral glucose tolerance test. — Danielle Weiss, Verywell Health, 30 Apr. 2025

Word History

First Known Use

Noun

2000, in the meaning defined above

Time Traveler
The first known use of A1c was in 2000

Phrases Containing A1c

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Cite this Entry

“A1c.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/A1c. Accessed 8 Aug. 2026.

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Medical Definition

A1c

noun
ˌā-ˌwən-ˈsē How to pronounce A1c (audio)
: hemoglobin a1c
At least twice a year he has an A1c test, which shows how well his blood sugar levels have been controlled over a three-month period.—Anita Manning, USA Today
Last Updated: - Updated example sentences
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