Wow, a Webby virgin node...
The jussive is a mood, or mood-modifying, grammatical form pertaining to a command. Also used as a noun, to refer to a word in the jussive form. The jussive is found in Latin, Arabic, Hebrew, and Italian. I've yet to find it in English, and I'm unsure whether it exists. Any cunning linguists in the crowd are free to /msg me to educate me in this regard.
Compare to: imperative, hortatory/hortatorily.
Example (Latin):
Viros bonos laudamus. : Indicative : 'We are praising good men.'
Viros bonos laudemus. : Jussive Subjunctive : 'Let us praise good men.'
Hoooray. Could you care any less? Perhaps. Oh well. Have a froot loopy day.