1 definition by The person who never was
The third largest planet (by diameter,) and fourth largest (by mass,) and the seventh from the sun in the solar system, Uranus is basically a large ball of hydrogen, methane, helium, and, to a lesser extent, ammonia (which gives it the bluish color). Uranus is pronounced your-anus by many, making it the butt (pun intended) of many jokes. Though many astronomers perfer to pronounce it yourunus.
Viewing Uranus in the sky through a telescope is basically looking at a blue ball with a black background.
by The person who never was March 15, 2007