To 'have a chip on your shoulder' means to have an irrational resentment directed at other people (especially those who are not a member of a group or community which you identify with) because of a sense of inferiority (or an erroneous impression that others see you as inferior).
Part of the Nanotechnology glossary: A nanometer is a unit of spatial measurement that is 10-9 meter, or one billionth of a meter. It is commonly used in nanotechnology, the building of extremely small machines. This was last updated in September 2005. Contributor(s): Ian Pulham.
What is a nanometer? A nanometer is one billionth of a meter. (A meter is 39.37 inches, or slightly longer than one yard.) The prefix ânanoâ means âone billionthâ, or 10-9, in the international system for units of weights and measures. For visual examples of the size of the nanoscale, see The Size of Nano.