D80

D80 is an alphanumeric designation used across multiple fields, referring to different concepts depending on the context. It appears in science, medicine, and consumer technology as a code, model number, or measurement.

In particle size analysis, D80 denotes the particle size at which 80 percent of the sample’s mass consists of particles of that size or smaller. It is part of a family of D-values, such as D10 and D50, which together describe the overall granulometry of a material. D80 is used to characterize fineness or coarseness in powders, soils, pharmaceuticals, and aerosols. Measurements can be obtained through methods like sieve analysis, laser diffraction, or dynamic light scattering, and the resulting D80 value informs quality control and process design.

In medical coding, D80 is a code within ICD-10-CM used in diagnosing and billing for immunodeficiencies. The D80 block covers immunodeficiency with predominantly antibody defects and related disorders. Subcodes under D80 specify particular antibody-related conditions, and the classification supports clinical documentation, billing, and epidemiological statistics.

In photography, D80 refers to the Nikon D80, a digital single-lens reflex camera introduced by Nikon in 2006. As part of Nikon’s consumer-grade DSLR lineup, it used a DX-format sensor and supported the Nikon F-mount system. The model is noted for its role in advancing accessible digital photography during its era.