muscle fiber

noun

one of the structural cells of a muscle.

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Word History and Origins

Origin of muscle fiber¹

First recorded in 1875–80

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Compare Meanings

How does muscle fiber compare to similar and commonly confused words? Explore the most common comparisons:

myofibril vs. muscle fiber

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"The biggest surprise about this was finding that a macrophage has a synaptic-like property that delivers an ion to a muscle fiber to facilitate its repair after an injury," Jankowski says.

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Obesity typically causes a reduction in muscle fiber diameter, but green tea prevented this muscle atrophy.

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"On MRI images, this decline can be seen as fatty degeneration of the muscle, where streaks of fat replace muscle fibers."

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When you train your muscles, or get injured, these satellite cells are activated to form new muscle fibers.

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Along with blue connective tissue and purple muscle fibers, the striped structure brings to mind …