Trademark. International Organization for Standardization.
the numerical exposure index of a photographic film under the system adopted by the International Organization for Standardization, used to indicate the light sensitivity of the film's emulsion.
Other definitions for iso (3 of 3)
a combining form meaning “equal,” used in the formation of compound words: isochromatic; in chemistry, used in the names of substances which are isomeric with the substance denoted by the base word: isocyanic acid.
An organization, the International Organization for Standardization, that sets standards in many businesses and technologies, including computing and communications. The term ISO is not an abbreviation, but instead derives from the Greek word īsos, meaning equal.
Scientific definitions for iso (2 of 2)
A prefix that means equal, as in isometric, having equal measurements.
A prefix used to indicate an isomer of an organic compound, especially a branched isomer of a compound that normally consists of a straight chain. The isomer is characterized by a Y-shaped branch at the end of the chain that consists of two prongs. Each prong consists of one carbon atom. Thus isopentane contains five carbon atoms like normal pentane, but arranged as a chain of three carbons plus a Y-shaped branch of two carbons at the end.