Ocean

An ocean was a large body of liquid.

Earth had several oceans, including the Atlantic, Indian and Pacific. (PROSE: Slow Decay)

On Skaro, the continent of Davius was separated from the others by an Ocean of Ooze. (COMIC: Genesis of Evil)

Historians believed that life on both Earth and Skaro had begun in their oceans. (PROSE: Dalek: The Astounding Untold History of the Greatest Enemies of the Universe)

The planet Aridius was once covered by oceans before a stellar incident turned it into a desert planet. (TV: The Chase)