\[Copyright] (Mathematica Character Name)

Unicode: 00A9. Letter-like form.

\[CounterClockwiseContourIntegral] (Mathematica Character Name)

Unicode: 2233. Alias: Esc cccint Esc. Compound operator. ∳ f x is by default interpreted as CounterClockwiseContourIntegral[f,x].

\[CurlyKappa] (Mathematica Character Name)

Unicode: 03F0. Aliases: Esc ck Esc, Esc ckappa Esc. Greek letter.

\[CurlyPi] (Mathematica Character Name)

Unicode: 03D6. Aliases: Esc cp Esc, Esc cpi Esc. Greek letter. Not commonly used, except in astronomy.

\[CurlyRho] (Mathematica Character Name)

Unicode: 03F1. Aliases: Esc cr Esc, Esc crho Esc. Greek letter.

\[Dalet] (Mathematica Character Name)

Unicode: 2138. Alias: Esc da Esc. Hebrew letter. Sometimes called daleth. Used occasionally in pure mathematics in the theory of transfinite cardinals.

\[Dash] (Mathematica Character Name)

Unicode: 2013. Alias: Esc - Esc. Letter-like form.

\[Delta] (Mathematica Character Name)

Unicode: 03B4. Aliases: Esc d Esc, Esc delta Esc. Greek letter.

\[Diameter] (Mathematica Character Name)

Unicode: 2300. Letter-like form. Used in geometry. Not the same as \[CapitalOSlash] or \[EmptySet].

\[Diamond] (Mathematica Character Name)

Unicode: 22C4. Alias: Esc dia Esc. Infix operator. x ⋄ y is by default interpreted as Diamond[x,y].