- The top or upper limit of a graphic tracing or of any variable. [M.E. peke, pike, fr. Sp. pico, beak, fr. L. picus, magpie]- biclonal p. two narrow electrophoretic bands thought to represent immunoglobulins of two cell lines.- juxtaphrenic p. (juks-ta-fren′ik pek) on chest radiograph, a triangular density on top of the right diaphragmatic shadow, probably caused by tension of the phrenic nerve on the pleura over the diaphragm.- monoclonal p. a narrow band visible on electrophoresis or an abnormal arc seen on immunoelectrophoresis, thought to represent immunoglobulin of one cell clone.
* * *(pēk) the top or upper limit of a graphic tracing or of any variable.
Medical dictionary. 2011.