Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A unit of length equal to one femtometer (10−15 meter).

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A unit of length equal to one femtometer or femtometre (10−15 m).

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[After Enrico Fermi.]

Examples

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.