ATTOSECOND


Meaning of ATTOSECOND in English

at ‧ to ‧ sec ‧ ond /ˈætəʊˌsekənd $ -toʊ-/ BrE AmE noun [countable] technical

a unit of time that is equal to 10 to the power of ↑ minus 18

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.