Leg pain is also frequently a sign of injury, such as the following: Muscle strain is a common injury that happens when the muscle fibers tear as a result of overstretching. It often occurs in the larger muscles, such as the hamstrings, calves, or quadriceps.
medical Definition of superinfection : a second infection superimposed on an earlier one especially by a different microbial agent of exogenous or endogenous origin that is resistant to the treatment used against the first infection
super. 1  Informal. a superintendent, especially of an apartment house. supermarket. supernumerary. 2  an article of a superior quality, grade, size, etc. ( 3 in beekeeping) the portion of a hive in which honey is stored. 4  Printing. supercalendered paper.