What about the following code?
Code:\begin{tabular}{lp{8.5cm}} $d$ & day of the year\\ $H$ & monthly average of daily global radiation on horizontal surface ($\mathrm{W}/\mathrm{m}^2\mathrm{day}$) \end{tabular} \begin{tabular}{lp{8.5cm}} $R_b$ & beam radiation conversion factor\\ $R_r$ & ground reflected radiation conversion factor\\ $R_t$ & total radiation conversion factor\\ \end{tabular}
I know how to handle it with tabular, but if there is a trick to make it work with nomencl package, that would be awesome.
I managed to span on two columns easily:
But I still have no idea how to make nomenclature to print in two columns.Code:\begin{table*}[!t] \begin{framed} \printnomenclature \end{framed} \end{table*}