| Definition/Meaning | Word/Phrase |
|---|---|
| distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers | light-year , light year |
| one part in a trillion equal parts | one-trillionth , trillionth |
| unit of information equal to a trillion (1,099,511,627,776) bytes or 1024 gigabytes | T , TB , terabyte |
| trillion prefix | tera- |
| one trillion periods per second | terahertz , THz |