Symbols:A
atto-
- $\mathrm a$
The Système Internationale d'Unités symbol for the metric scaling prefix atto, denoting $10^{\, -18 }$, is $\mathrm { a }$.
Its $\LaTeX$ code is \mathrm {a}
.
are
- $\mathrm a$
One are is equal to a square whose side measures $10$ metres.
\(\ds \) | \(\) | \(\ds 1\) | are | |||||||||||
\(\ds \) | \(=\) | \(\ds 100\) | square metres | |||||||||||
\(\ds \) | \(\approx\) | \(\ds 119 \cdot 60\) | square yards |
Hexadecimal
- $\mathrm A$ or $\mathrm a$
The hexadecimal digit $10$.
Its $\LaTeX$ code is \mathrm A
or \mathrm a
.
Celestial Altitude
- $a$
Let $X$ be a point on the celestial sphere.
The (celestial) altitude of $X$ is defined as the angle subtended by the the arc of the vertical circle through $X$ between the celestial horizon and $X$ itself.
It is often denoted by $a$.
Azimuth (Astronomy)
- $A$
Let $X$ be a point on the celestial sphere.
The spherical angle between the principal vertical circle and the vertical circle on which $X$ lies is the azimuth of $X$.
The azimuth is usually measured in degrees, $0 \degrees$ to $180 \degrees$ either west or east, depending on whether $X$ lies on the eastern or western hemisphere of the celestial sphere.
It is often denoted by $A$.
Ampere
- $\mathrm A$
The symbol for the ampere is $\mathrm A$.
Its $\LaTeX$ code is \mathrm A
.
Angstrom
- $\mathring {\mathrm A}$
The symbol for the angstrom is $\mathring {\mathrm A}$.
Its $\LaTeX$ code is \mathring {\mathrm A}
.
Alternating Group
- $A_n$
The alternating group on $n$ letters.
Inverse
- a-
Prefix indicating anti.
An abbreviation for arc, anti- or argument.
Not
- a-
Prefix indicating not.