\begin{definition}[Definition:Lattice Point/Rational]
Let $\CC$ be a cartesian coordinate system of $n$ dimensions.
Let $P = \tuple {a_1, a_2, \ldots, a_n}$ be a point in $\CC$.
$P$ is a '''rational lattice point''' of $\CC$ {{iff}} $a_1, a_2, \ldots, a_n$ are all rational numbers.
\end{definition}