Google
  Web Word Quests Site   

There is one search term on this page.
 


atto- [A toh] (Danish or Norwegian: eighteen; a decimal prefix used in the international metric system for measurements).

This prefix is used in the metric [decimal] system as quintillionth [U.S.] and trillionth part [U.K.], 10-18 [0.000 000 000 000 000 001]. The metric symbol for atto- is a.

attoampere:
attogram:
attosecond:
attotesla: