Preferred Label : electron density function; 
IUPAC definition : The electron probability distribution function, ρ, defined as \[\rho (\mathbf{r})
               n\ \int \Psi  {{*}}\left[\mathbf{r}(1),\mathbf{r}(2)\,{...}\,\mathbf{r}(n)\right]\
               \Psi \left[\mathbf{r}(1),\mathbf{r}(2)\,{...}\,\mathbf{r}(n)\right]{d}\mathbf{r}(2)\,{...}\,{d}\mathbf{r}(n)\]
               where Ψ is an electronic wave-function and integration is made over the coordinates
               of all but the first electron of n. The physical interpretation of the electron density
               function is that ρ d r gives the probability of finding an electron in a volume element
               dr,  i i.e /i ., electron density in this volume.; 
         
         
            Origin ID : ET07024; 
 See also See also
 
         
         
         The electron probability distribution function, ρ, defined as \[\rho (\mathbf{r})
            n\ \int \Psi  {{*}}\left[\mathbf{r}(1),\mathbf{r}(2)\,{...}\,\mathbf{r}(n)\right]\
            \Psi \left[\mathbf{r}(1),\mathbf{r}(2)\,{...}\,\mathbf{r}(n)\right]{d}\mathbf{r}(2)\,{...}\,{d}\mathbf{r}(n)\]
            where Ψ is an electronic wave-function and integration is made over the coordinates
            of all but the first electron of n. The physical interpretation of the electron density
            function is that ρ d r gives the probability of finding an electron in a volume element
            dr,  i i.e /i ., electron density in this volume.