myo·​glo·​bin | \ ˌmī-ə-ˈglō-bən How to pronounce myoglobin (audio) , ˈmī-ə-ˌglō \

Definition of myoglobin

: a red iron-containing protein pigment in muscles that is similar to hemoglobin

Examples of myoglobin in a Sentence

Recent Examples on the Web 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 Iron is needed to make hemoglobin and myoglobin, important proteins in red blood cells that carry oxygen throughout your body and muscles. Katlyn Moncada, Better Homes & Gardens, 15 Dec. 2021 His urine was dark because the oxygen-carrying parts of the muscle known as myoglobin were collecting in the kidneys. New York Times, 14 July 2021 His urine was not tested, but the discoloration was likely the result of the excess myoglobin. Washington Post, 12 Feb. 2021 Each company needed to come up with a means of mimicking myoglobin’s function in the sensory experience of biting into a cut of beef. Paul Tullis, Town & Country, 2 May 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'myoglobin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of myoglobin

1925, in the meaning defined above

History and Etymology for myoglobin

International Scientific Vocabulary

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Time Traveler for myoglobin

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The first known use of myoglobin was in 1925

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Last Updated

10 Sep 2022

Cite this Entry

“Myoglobin.” Dictionary, Merriam-Webster, Accessed 5 Oct. 2022.

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More Definitions for myoglobin


myo·​glo·​bin | \ ˌmī-ə-ˈglō-bən, ˈmī-ə-ˌ How to pronounce myoglobin (audio) \

Medical Definition of myoglobin

: 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 Encyclopedia article about myoglobin


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