FEMTO-


Meaning of FEMTO- in English

combining form Etymology: International Scientific Vocabulary, from Danish or Norwegian femten fifteen, from Old Norse fimmtān; akin to Old English fīftēne fifteen one quadrillionth (10 -15 ) part of

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.