Following the solution given in this thread, I am using
Code: Select all
\renewcommand{\nomlabel}[1]{\smash{\parbox[t]{1.5cm}{#1}}\hfil}
\nomgroup
(see below).
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\documentclass{article}\usepackage{ifthen}\usepackage{calc}\usepackage[noprefix]{nomencl}% Configure title of groups\newcommand{\bfdz}[1]{\bf\fontsize{12}{14}\selectfont #1}\newcommand{\meru}[1]{\rule[2pt]{\textwidth-(\widthof{#1})}{.5pt}}% Enable two line label\renewcommand{\nomlabel}[1]{\smash{\parbox[t]{1.5cm}{#1}}\hfil}% Create Groups\renewcommand{\nomgroup}[1]{%\ifthenelse{\equal{#1}{A}}{\vspace{5mm} \item[\bfdz General Symbols] \meru{\bfdz General Symbols~~}}{%\ifthenelse{\equal{#1}{G}}{\vspace{5mm} \item[\bfdz Greek Symbols] \meru{\bfdz Greek Symbols~~}}{}}}\makenomenclature\begin{document}\printnomenclature[1.5cm]\nomenclature[A]{$p(r_m,t)$, $p_m(t)$}{Received signal at the $m^{th}$ microphone\nomrefpage}%{}{}\nomenclature[G]{$\Delta t_{\vec{x}}$}{Emission time delay at focus point $\vec{x}$, $\Delta t_{\vec{x}}=r_{\vec{x}} / c$\nomrefpage}%{}{}\end{document}
Thanks,
Will