mesophragma

M line

a fine line in the center of the A band of the sarcomere of striated muscle myofibrils.
Synonym(s): M band, mesophragma
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