Classifying blood, tissues, cells, disease-causing organisms, and other materials so they can be compared with standards.
A laboratory method of determining the antigenic characteristics (type) of a blood or tissue sample, i.e., of determining whether or not the blood or tissue taken is likely to cause a reaction if introduced into another person with whom the type can be compared.
Identification of type (e.g., of a specimen of genetic material through the detection of its specific nucleic acid sequences).
A broad phrase referring to methods used to categorize blood or tissues.