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.
Units of measure. Nanometer (nm), an SI unit of length, equal to 10 â9 m (a billionth of a meter) Nanomolar (nM), in chemistry, one thousand-millionth of a molar; Nautical mile (NM or nmi), a unit of length used for maritime and aviation purposes; Newton metre (Nm, may also be written as NÂ·m), a unit of torque