'nano-' definitions:

Definition of 'nano-'

From: GCIDE
  • nano- \nan"o-\ (n[a^]n"[-o]-), pref.
  • 1. A prefix meaning one-billionth; as, a nanogram is one-thousandth of a microgram. [PJC]
  • 2. Very small; submicroscopic; -- used to designate sizes smaller than those that would be referred to as micro-; as, nanoscale manipulations. [PJC]