Tera-

Tera- is a metric prefix denoting a factor of a short-scale trillion or long-scale billion. It was adopted in the International System of Units in 1960. The prefix is derived from the Greek word τέρας, meaning "monster".

Exponentiation

1 Tm² means one square terametre, or the size of a × square, not square metres.
1 Tm³ means one cubic terametre, or the size of a × × cube, not cubic metres
Computing

In computing, tera- may sometimes refer to 2⁴⁰ instead of 10¹², such as in data storage units like the terabyte. The binary prefix tebi- has been adopted by the International Electrotechnical Commission to signify 2⁴⁰ and avoid this ambiguity. JEDEC however still uses tera- for 2⁴⁰ in its memory standards.

terabyte : unit of digital storage used in hard disk drives and solid-state drives.
* terabytes written, a standard for SSD reliability metrics by JEDEC.
terabit : common in data transmission rates.
teraFLOPS : used to describe performance in supercomputers and graphics processing units.
* terascale computing
Electromagnetism
terahertz : used to describe electromagnetic radiation with frequencies between microwave and infrared ranges, as in:
* terahertz laser
* terahertz metamaterial
* terahertz radiation
** terahertz spectroscopy
** terahertz tomography
** terahertz nondestructive evaluation
Energy and power
terajoule : used to express energy yields of large events, such as nuclear explosions or earthquakes.
terawatt : used in measuring global electrical generation and consumption.
* Worldwide installed solar capacity reached several terawatts in 2022.
* Peak power of a 30-microsecond lightning strike.
terawatt-hour : common unit for large-scale electrical energy production or consumption.