Unicode: 212B. Alias: Esc Ang Esc. Letter-like form. Unit corresponding to 10^-10 meters. Not the same as the letter \[CapitalARing].

Unicode: 0394. Aliases: Esc D Esc, Esc Delta Esc. Greek letter. Not the same as \[EmptyUpTriangle] or \[DifferenceDelta]. Sometimes used in mathematics to denote Laplacian.

Unicode: 2210. Alias: Esc coprod Esc. Infix operator. x ∐ y is by default interpreted as Coproduct[x,y]. ∐ x is by default interpreted as Coproduct[x]. Coproduct is used as ...

Unicode: 224D. Infix similarity operator. x ≍ y is by default interpreted as CupCap[x,y]. Used in mathematics for various notions of equivalence, usually fairly weak. f ≍ g ...

Unicode: 00B0. Alias: Esc deg Esc. Letter-like form with built-in value. Interpreted by default as the symbol Degree. 30 ° is interpreted as 30Degree. The symbol ° is ...

Unicode: F74C. Alias: Esc dd Esc. Compound operator with built-in evaluation rules.  can only be interpreted by default when it appears with ∫ or other integral operators. ∫ ...

Unicode: 2250. Alias: Esc .= Esc. Infix similarity operator. x ≐ y is by default interpreted as DotEqual[x,y]. Used to mean approximately equal, or in some cases, 'image of', ...

Unicode: 21D4. Alias: Esc <=> Esc. Infix arrow operator. x ⇔ y is by default interpreted as DoubleLeftRightArrow[x,y]. Used in mathematics to indicate logical equivalence. ...

Unicode: 2026. Alias: Esc ... Esc. Letter-like form. Used to indicate omitted elements in a row of a matrix. \[Ellipsis] on its own will act as a symbol.

Unicode: 25E6. Alias: Esc esci Esc. Letter-like form. Not the same as the infix operator \[SmallCircle]. Used as an overscript to add ring diacritical marks.