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
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But the AirTrain — which connects with the A/E/J/Z lines and the LIRR — hasn’t been affected.
—
Stefanie Waldek, Curbed, 30 June 2025
Trains on the 2, 3, A, C, J and Z lines were running at lower speeds in the area.
—Joe Ruiz Jr., CBS News, 18 Apr. 2023
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Stefanie Waldek, Curbed, 30 June 2025
Trains on the 2, 3, A, C, J and Z lines were running at lower speeds in the area.
—Joe Ruiz Jr., CBS News, 18 Apr. 2023
Cite this Entry
“Z line.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Z%20line. Accessed 13 Jul. 2025.
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