heme

noun

: the deep red iron-containing prosthetic group C34H32N4O4Fe of hemoglobin and myoglobin

Examples of heme in a Sentence

Recent Examples on the Web Pairing iron-rich plant foods with heme iron sources found in meat, poultry, and fish can also optimize overall absorption. Mira Miller, Verywell Health, 12 Dec. 2023 With its advanced formula based on heme iron, Simply Heme provides a more efficient way for the body to absorb and use iron. Amber Smith, Discover Magazine, 10 Aug. 2023 Iron found in food comes in two different forms: heme and nonheme. Amber Smith, Discover Magazine, 12 Oct. 2022 There are two types of iron found in foods: heme and non-heme iron. Katlyn Moncada, Better Homes & Gardens, 15 Dec. 2021 Unfortunately, those unfinished heme precursors are toxic, especially to nerve cells. Tony Dajer, Discover Magazine, 6 Oct. 2016 The mutation affects an enzyme involved in turning compounds called porphyrins and porphyrin precursors into heme, which makes up hemoglobin, the iron-containing red protein in blood responsible for transporting oxygen. Beth Mole, Ars Technica, 28 Apr. 2023 Porphyria is the family name for diseases of faulty heme production. Tony Dajer, Discover Magazine, 6 Oct. 2016 In people with porphyrias, the heme precursors build up, causing disease that can present as abdominal pain, arm and leg pain, paresthesia, weakness, and tachycardia. Beth Mole, Ars Technica, 28 Apr. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'heme.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

International Scientific Vocabulary, from hematin

First Known Use

1925, in the meaning defined above

Time Traveler
The first known use of heme was in 1925

Dictionary Entries Near heme

Cite this Entry

“Heme.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heme. Accessed 21 Feb. 2024.

Kids Definition

heme

noun
: a deep red pigment that contains iron and is obtained from hemoglobin

Medical Definition

heme

noun
variants or chiefly British haem
: the deep red iron-containing prosthetic group C34H32N4O4Fe of hemoglobin and myoglobin that is a ferrous derivative of protoporphyrin and readily oxidizes to hematin or hemin

called also protoheme

More from Merriam-Webster on heme

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