Z line
noun
: any of the dark thin bands across a striated muscle fiber that mark the junction of actin filaments in adjacent sarcomeres
Examples of Z line in a Sentence
Recent Examples on the Web
Trains on the 2, 3, A, C, J and Z lines were running at lower speeds in the area.
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Joe Ruiz Jr., CBS News, 18 Apr. 2023
Joe Ruiz Jr., CBS News, 18 Apr. 2023
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'Z line.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
First Known Use
1916, in the meaning defined above
Dictionary Entries Near Z line
Cite this Entry
“Z line.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Z%20line. Accessed 18 Apr. 2024.
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Medical Definition
Z line
noun
: any of the dark bands across a striated muscle fiber that mark the junction of actin filaments in adjacent sarcomeres
More from Merriam-Webster on Z line
Britannica.com: Encyclopedia article about Z line
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