a fine line in the center of the A band of the sarcomere of striated muscle myofibrils.
Farlex Partner Medical Dictionary © Farlex 2012
mesophragma(mĕs″ō-frăg′mă) [″ + phragmos, a fencing in]
A band in the center of the A band in the myofibrils of a striated muscle.
Medical Dictionary, © 2009 Farlex and Partners