MaxPlotPoints is an option for plotting functions like ArrayPlot and ListPlot3D that specifies the maximum number of points that will explicitly be included in the output.
MaxRecursion is an option for functions like NIntegrate and Plot that specifies how many recursive subdivisions can be made.
MaxStableDistribution[\[Mu], \[Sigma], \[Xi]] represents a generalized maximum extreme value distribution with location parameter \[Mu], scale parameter \[Sigma], and shape ...
MaxStepFraction is an option to functions like NDSolve that specifies the maximum fraction of the total range to cover in a single step.
MaxStepSize is an option to functions like NDSolve that specifies the maximum size of a single step used in generating a result.
MaxSteps is an option to functions like NDSolve that specifies the maximum number of steps to take in generating a result.
MaxValue[f, x] gives the maximum value of f with respect to x.MaxValue[f, {x, y, ...}] gives the maximum value of f with respect to x, y, .... MaxValue[{f, cons}, {x, y, ...
MaxwellDistribution[\[Sigma]] represents a Maxwell distribution with scale parameter \[Sigma].
McLaughlinGroupMcL[] represents the sporadic simple McLaughlin group McL.
MeanDeviation[list] gives the mean absolute deviation from the mean of the elements in list.