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Z line

noun

Definition of Z line

: any of the dark thin bands across a striated muscle fiber that mark the junction of actin filaments in adjacent sarcomeres

First Known Use of z line

1916

in the meaning defined above

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Medical Dictionary

Z line

noun

medical Definition of Z line

: any of the dark bands across a striated muscle fiber that mark the junction of actin filaments in adjacent sarcomeres

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Z line
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