CenterDot[x, y, ...] displays as x\[CenterDot]y\[CenterDot]....
Character represents a single character in Read.
ChartLegends is an option for charting functions that specifies what legends should be used for chart elements.
CircleDot[x, y, ...] displays as x\[CircleDot]y\[CircleDot]....
CircleTimes[x] displays as \[CircleTimes]x.CircleTimes[x, y, ...] displays as x\[CircleTimes]y\[CircleTimes]....
ClusteringComponents[array] gives an array in which each element of array is replaced by an integer index representing the cluster in which the element ...
Colon
(Built-in Mathematica Symbol) Colon[x, y, ...] displays as x \[Colon] y \[Colon] ....
Congruent[x, y, ...] displays as x \[Congruent] y \[Congruent] ....
Context
(Built-in Mathematica Symbol) Context[] gives the current context. Context[symbol] gives the context in which a symbol appears.
Contexts[] gives a list of all contexts. Contexts["string"] gives a list of the contexts that match the string.