A question about Emacs fontset?

[Leon <sdl.web@gmail.com>]

Hi there,

I use terminus as the default font for my emacs. I like it a
lot. However, it does not have a italic version. This causes
inconvenience in muse-mode. I'd like to set emacs to use another font
for displaying italic faces. But I don't know how to do it? Any ideas?
If you don't mind, could you share your font setting. Many thanks.

,------[ ~/.Xresources ]
| Emacs*Fontset-0: -*-terminus-medium-r-*-*-16-*-*-*-*-*-fontset-unicode,\
| mule-unicode-2500-33ff: -gnu-unifont-medium-r-*-*-16-*-*-*-*-*-iso10646-1,\
| mule-unicode-e000-ffff: -gnu-unifont-medium-r-*-*-16-*-*-*-*-*-iso10646-1,\
| mule-unicode-0100-24ff: -gnu-unifont-medium-r-*-*-16-*-*-*-*-*-iso10646-1
| Emacs.Font: fontset-unicode
`------------------------------------------------------------------------

Regards,
-- 
Leon