Definitions for "IC50"
" Inhibition Concentration 50% " or concentration inhibiting of 50% a parameter like the growth or luminescence compared to control
The IC50 represents the concentration of a drug that is required for 50 percent inhibition in an assay.
Concentration of inhibitor at which 50% of the turnover of a single concentration of a form-selective substrate is inhibited.
Keywords:  phenotypic, hiv, slow, needed, growth
In phenotypic testing, IC50 is the amount of a particular drug needed to slow the growth of HIV by 50%.