Definitions for "FWHM"
Keywords:  width, spectral, half, spatial, maximum
Full Width, Half Maximum. The bandwidth of an optical instrument as measured at the half-power points.
Full Width at Half Maximum. Method for characterising the width of a peak on a graph.
Full Width at Half Maximum, a measure of the width of a distribution, frequently used to describe the resolving power of the CCD for spectral emission lines.