from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A large specialized mitrochondrion found in striated muscle.

from The Century Dictionary.

  • noun The fleshy part of a coral.
  • noun The darker and actively contractile portion of a muscle fibril.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a large mitochondrion in a striated muscle fiber


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