\begin{definition}[Definition:Apotome of Medial/Terms]
Let $a, b \in \set {x \in \R_{>0} : x^2 \in \Q}$ be two rationally expressible numbers such that $a > b$.
Let $a - b$ be an apotome of a medial.
The '''terms''' of $a - b$ are the elements $a$ and $b$.
\end{definition}