Libido

Noun

1. Sexual urges or drives.

   "Good grief man, control your libido!"

2. Drives or mental energies related to or based on sexual instincts but not necessarily sexual in and of themselves.

   "For Freudians, libido means the desire to "unite and bind" with objects in the world."

3. Synonym of albedo in terms of a planet's, such as that of Mars, average surface spectral reflectivity.