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.
Adorable animal families that will make you aww. A nanometer is quite small, a billionth of a meter. It is 20 times wider than the diameter of a hydrogen atom. In terms of the electromagnetic spectrum, 1 nanometer is about the wavelength of soft x-rays. Hard x-rays and gamma rays have a shorter wavelength. The width of a DNA double-helix, the molecule that carries our genetic code, is about 2 nanometers.