What do I call an arbitrary element of this set of vectors? $ \begin{align*} \{&\langle 1, 0, 0 \rangle, \\ &\langle 0, 1, 0 \rangle, \\ &\langle 0, 0, 1 \rangle, \\ &\langle -1, 0, 0 \rangle, \\ &\langle 0, -1, 0 \rangle, \\ &\langle 0, 0, -1 \rangle \} \\ \end{align*} $
The significance is that this set contains every unit vector which lies on a cubical grid (is in $\mathbb{Z}^3$, as are all sums of elements). In particular, they are all possible directions of motion to adjacent grid points.
It differs from the standard basis for $\mathbb{R}^3$ in including the inverse of each basis vector.
The context is computer game/graphics programming.