One of the mysteries of the English language finally explained.
The application of immunological methods (such as immunofluorescence, immunoperoxidase, etc.) in histochemistry; the study of the constituents of tissues and cells using such methods. Also: the immunohistochemical characteristics of a cell or tissue type, cellular constituent, etc.
1960s; earliest use found in Journal of Cell Biology. From immuno- + histochemistry, after immunohistochemical.
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