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sarcolemma

American  
[sahr-kuh-lem-uh] / ˌsɑr kəˈlɛm ə /

noun

Anatomy.
  1. the membranous sheath of a muscle fiber.


sarcolemma British  
/ ˌsɑːkəʊˈlɛmə /

noun

  1. the membrane covering a muscle fibre

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • sarcolemmic adjective
  • sarcolemmous adjective

Etymology

Origin of sarcolemma

First recorded in 1830–40; sarco- + lemma 2

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 plasma membrane of a skeletal muscle fiber is called the sarcolemma.

From Textbooks • Jun. 9, 2022

The ACh molecules diffuse across a minute space called the synaptic cleft and bind to ACh receptors located within the motor end-plate of the sarcolemma on the other side of the synapse.

From Textbooks • Jun. 19, 2013

Propagation of an action potential along the sarcolemma is the excitation portion of excitation-contraction coupling.

From Textbooks • Jun. 19, 2013

During the latent period, the action potential is being propagated along the sarcolemma.

From Textbooks • Jun. 19, 2013

Moreover, the muscle fibers of the heart are peculiar in that they are destitute of sarcolemma, the naked muscle fibers directly touching each other.

From Hygienic Physiology : with Special Reference to the Use of Alcoholic Drinks and Narcotics by Steele, Joel Dorman