tera- [TE ruh]

(Greek: "monster, marvel"; a decimal prefix used in the international metric system for measurements)

Used in the metric [decimal] system as one trillion [U.S.] and billionfold [U.K.]: 1012 [1 000 000 000 000] or a million million. The metric symbol for tera- is T.

According to the Academic Press Dictionary of Science and Technology, Harcourt Brace Jovanovich, Publishers, 1992: Tera- comes "from a Greek term meaning 'marvel' or 'monster,' with the sense that this is a huge and marvelous quantity." Oh, PLEASE!

It would make much more sense to have tera based on tetra- (Greek), "four" rather then terato-, "monster, marvel"; which has no relative connection with this or any other metric unit.

One trillion bits (eight bits make a byte, the common measure of memory or storage capacity). The word "bit" is a blend of binary and digit.
A unit of information of one trillion bytes.
One trillion curies. A curie is a unit of radioactivity equal to 3.7 times ten to the tenth power disintegrations per second.
One trillion cycles (complete processes or sequences of pocesses in a machine or electronic device, or the time that this takes).
One trillion floating-point operations per second; a measure of computer speed.
A unit of frequency equal to one trillion hertz.
A unit of electrical resistance, equal to one trillion ohms, or 1 000 000 megaohms.
An ohmmeter having a teraohm range for measuring extremely high insulation resistance values.
One trillion pascals (units of pressure or stresses equal to one newton per square meter).
One trillion seconds.
One trillion volts.
A unit of power, equal to one trillion watts, or 1 000 000 megawatts.

Related "metric" families: yotta; zetta; exa; peta; giga; mega; kilo; hecto; deka; deci; centi; milli; micro; nano; pico; femto; atto; zepto; yocto.