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Accession NumberBioinformatics A unique alphanumeric character set which is assigned to each entry in a database to unambiguously identify that particular record. An accession number is given to a nucleic acid sequence when submitted to a DNA repository—e.g., GenBank, EMBL, DDBJ, SWISS-PROT.
Examples MGI accession IDs, GenBank accession IDs, MedLine accession IDs
Lab medicine A unique alphanumeric character set which is assigned to each specimen processed in a laboratory and which is generally of lesser importance than the patient information, except in the case of timed specimens.