Type the code 21c4 and then press Alt+X. This will insert the
character with that hexadecimal code from the Lucida Sans Unicode
font.

The same character (with the same hex code) is also available in the
Arial Unicode MS font, but you have to use the Insert Symbol dialog
(or insert the Lucida character and then change its font) to get it.
The Arial character is noticeably narrower than the Lucida one.

--
Regards,
Jay Freedman
Microsoft Word MVP FAQ: http://word.mvps.org