femto-

a combining form used in the names of units of measurement which are 10−15 (one quadrillionth) smaller than the unit denoted by the base word.

Origin of femto-

< Danish, Norwegian femt(en) fifteen + -o-

Words nearby femto-

femoral nerve, femoral sheath, femoral triangle, femoral vein, femorotibial, femto-, femtometer, femur, fen, fen-phen, fenagle

British Dictionary definitions for femto-

femto-

prefix

denoting 10 –15 femtometer Symbol: f

Word Origin for femto-

from Danish or Norwegian femten fifteen

Medical definitions for femto-

femto-

pref.

One quadrillionth (10-15):femtovolt.