\documentclass{article} \usepackage[cfg=sample05.cfg]{nomencl} \makenomenclature \begin{document} \section*{Main equations} \begin{equation} a=\frac{N}{A} \end{equation}% \newcommand{\magritte}{Not the number } \nomenclature{$a$}{\magritte of angels per unit area}% \nomenclature{$N$}{\magritte of angels per needle point}% \nomenclature{$A$}{The area of the needle point}% The equation $\sigma = m a$% \nomenclature{$\sigma$}{The total mass of angels per unit area}% \nomenclature{$m$}{The mass of one angel} follows easily. \renewcommand{\magritte}{The number } \printnomenclature \end{document}