1. A prefix meaning a trillionth or one-millionth of one-millionth Symbol isp.

2. One trillionth ( 10 - 12 ) of a farad.

3. One trillionth ( 10 - 12 ) of a second.

4. He made a map of the world at one ten trillionth scale.

5. Collisions, collisions which occurred occurred in the universe when it was a trillionth a second old.

6. It was found in concentrations of 29 to 850 pico grammes per cubic metre of air. A micro gramme is one trillionth of a gramme.

7. Collisions which occurred in the universe when ( it was ) something like a trillionth of second old.