What is the meaning of 'libido' in Star Driver: Kagayaki no Takuto?

i just started a few episodes of this anime.. and the Glittering Crux (i think they're the bad guys) keeps on mentioning this word regarding their mecha Cybodies.. i feel like watching a.. porn ;) *btw.. the anime does have romance and people naked here and there.. but it is not a hentai*