Definition of Optical density

1. Noun. (physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation.

Exact synonyms: Absorbance, Photographic Density, Transmission Density
Generic synonyms: Denseness, Density
Category relationships: Natural Philosophy, Physics

Medical Definition of Optical density

1. 1. Absorbance is defined as a logarithmic function of the percent transmission of a wavelength of light through a liquid. 2. This can be used as a measure of the amount of light absorbed by a suspension of bacterial cells or a solution of an organic molecule, it is measured by a colourimeter or spectrophotometer. Absorbance values are used to plot the growth of bacteria in suspension cultures and to gauge the purity and concentration of molecules (such as proteins) in solution. See: absorption. (15 Jan 1998)

Lexicographical Neighbors of Optical Density

optic stalk
optic tectum
optic tract
optical
optical aberration
optical activity
optical antipode
optical art
optical astronomy
optical axis
optical bench
optical character recognition
optical condenser
optical crown
optical density (current term)
optical device
optical diffraction
optical disc
optical discs
optical disk
optical double
optical drive
optical fiber
optical fibers
optical fibre
optical flat
optical flint
optical fusion

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