Terran was a word used to refer to anything attributed to Humans or the planet Earth, which in Latin is Terra. The Klingonese word for Human is "tera'ngan". (ENT: "Affliction"; Star Trek V: The Final Frontier)
Usage when referring to things attributed to Humans:
- "Terran" was used explicitly to refer to Humans...
- The SS Mariposa used a Terran distress beacon created by the European Hegemony. (TNG: "Up The Long Ladder")
- Data referred to Terran conjugal rites. (Star Trek Nemesis)
- Shinzon saw a Romulan doctor who had experience in Terran illnesses. (Star Trek Nemesis)
Usage when referring to things attributed to Earth: