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.
Unicode: 25B3. Letter-like form. Used in geometry to indicate a triangle, as in the symbol △ABC. Not the same as \[CapitalDelta].
Unicode: F7D4. Alias: Esc ent Esc. Letter-like form. Representation of the Enter key on a keyboard. Used in describing how to type textual input.
Unicode: 21CC. Alias: Esc equi Esc. Infix arrow-like operator. x ⇌ y is by default interpreted as Equilibrium[x,y]. Used in chemistry to represent a reversible reaction. ...
\[HBar]
(Mathematica Character Name) Unicode: 210F. Alias: Esc hb Esc. Letter-like form. Used in physics to denote Planck's constant divided by 2π; sometimes called Dirac's constant.
Unicode: 224F. Alias: Esc h= Esc. Infix similarity operator. x ≏ y is by default interpreted as HumpEqual[x,y]. Sometimes used to mean "approximately equal" and sometimes ...
Unicode: 03DF. Aliases: Esc ko Esc, Esc koppa Esc. Special Greek letter. Analogous to English q. Appeared between π and ρ in early Greek alphabet; used for Greek numeral 90.
Unicode: 22A3. Alias: Esc lT Esc. Infix operator. x ⊣ y is by default interpreted as LeftTee[x,y]. x ⊣ y ⊣ z groups as (x ⊣ y) ⊣ z. Used in mathematics to indicate the lack ...
Unicode: 22B2. Infix ordering operator. x ⊲ y is by default interpreted as LeftTriangle[x,y]. Used in pure mathematics to mean 'normal subgroup of'.