MCL

1. abbreviationinitialismlawInitialism of Michigan Compiled Laws.

plural MCLs

1. abbreviationinitialismanatomyInitialism of medial collateral ligament.

   ACL tears do require surgery, but MCL tears can heal on their own, according to doctors.

   2013 February 6, Jen Christiensen, “Vonn’s injury ‘career-delayer,’ not ‘career ender’”, in CNN

2. abbreviationinitialismInitialism of maximum containment level.

   For PFOA and PFOS, the enforceable maximum contaminant levels (MCLs) will be set at 4.0 parts per trillion individually.

   2024 April 10, Jen Christiensen, “Biden administration sets first national standard to limit ‘forever chemicals’ in drinking water”, in CNN