myo·​glo·​bin ˌmī-ə-ˈglō-bən How to pronounce myoglobin (audio)
: a red iron-containing protein pigment in muscles that is similar to hemoglobin

Examples of myoglobin in a Sentence

Recent Examples on the Web As Goldwyn discovered in his deep dive on the topic, meat with a higher pH, or low acidity, can retain a pink hue from the myoglobin to much higher temps, up to 170 or 180 degrees. Becky Krystal, Washington Post, 31 July 2023 No myoglobin means that these muscles stay colorless or white. Elsbeth Sites, Discover Magazine, 22 Apr. 2014 While the presence of myoglobin isn’t necessarily cause for worry, too much of it can lead to kidney damage. Nathaniel Scharping, Discover Magazine, 29 Mar. 2017 Meat is categorized as red or white depending on its myoglobin content. Bryant Stamford, The Courier-Journal, 8 Nov. 2022 By shining light through your skin and measuring what’s reflected, NIRS can assess what percentage of hemoglobin and myoglobin molecules in the muscle and tissue underneath are carrying oxygen. Alex Hutchinson, Outside Online, 18 July 2022 In fact, research tells us that the best way to develop myoglobin is through high-intensity running (above 80 percent VO2max). Luke Humphrey, Outside Online, 13 Nov. 2020 Cellular damage post-marathon is best measured by the presence and production of creatinine kinase (CK)—a marker that indicates damage to skeletal and myocardial tissue — and increased myoglobin levels in the blood stream. Jeff Gaudette, Outside Online, 22 Nov. 2019 One study concluded that CK damage persisted more than seven days post-marathon while another study discovered the presence of myoglobin in the bloodstream for 3-4 days post race. Jeff Gaudette, Outside Online, 22 Nov. 2019

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

Word History


International Scientific Vocabulary

First Known Use

1925, in the meaning defined above

Time Traveler
The first known use of myoglobin was in 1925

Dictionary Entries Near myoglobin

Cite this Entry

“Myoglobin.” Dictionary, Merriam-Webster, Accessed 15 Apr. 2024.

Medical Definition


: a red iron-containing protein pigment in muscles that is similar to hemoglobin but differs in the globin portion of its molecule, in the smaller size of its molecule (as in the mammalian heart muscle which has only one fourth the molecular weight of the hemoglobin in the blood of the same animal), in its greater tendency to combine with oxygen, and in its absorption of light at longer wavelengths

called also myohemoglobin

More from Merriam-Webster on myoglobin

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