\documentclass{article}

\usepackage[notree,shortcuts]{glossaries}

\newglossaryentry{Blackbox}
{
  name=Blackbox models,
  sort=blackbox,
  description={--- In system identification, the term \emph{blackbox} modelling refers to the process of modelling a system through non-parametric techniques, without knowledge of physical inner workings of the system, resulting in an \emph{empirical} model}
}
\newglossaryentry{Whitebox}
{
  name=Whitebox models,
  sort=whitebox,
  description={--- In system identification, the term \emph{whitebox} modelling refers to the process of modelling a system through first principles, laws of physics and explicit assumed relationships between the input and output through prior knowledge of the system, resulting in a \emph{mechanistic} model}
}
\newglossaryentry{Mechanistic}
{
  name=Mechanistic models,
  sort=mechanistic,
  description={},
  see=[see also]{Whitebox},
  nonumberlist
}
\newglossaryentry{Empirical}
{
  name=Empirical models,
  sort=empirical,
  description={},
  see=[see also]{Blackbox},
  nonumberlist
}
\makeglossaries
\glssee[see also]{Empirical}{Blackbox}
\begin{document}
Something about \gls{Blackbox} and \gls{Whitebox}
\newpage
\printglossary[title={Glossaries}]
\end{document}