From Hidden Frontier
Humans (Homo sapiens) were one of two known spacefaring intelligent species to have originated from the planet Earth (the other was the Voth). As the Latin word for their home world was "Terra", Humans are sometimes referred to as "Terrans". Occasionally the term Terran was used to distinguish Humans living on Earth from those resident on colonies on other planets and moons. Some people used the adjective "Terran" to refer to subjects or institutions associated with humanity (Terran cuisine, Terran literature, Terran art, etc).