What does "rhodamine-conjugated" mean?

Question

I know it has something to do with microscopy and staining cells. Thanks.

Answer 1

Rhodamine is a family of related chemical compounds, fluorone dyes. Rhodamine dyes fluoresce and can thus be detected easily and inexpensively.

Rhodamine can be bonded to a protein to label it (=rhodamine conjugated) for detection of the protein in for example microscopy.

Answer 2

It means "covalently bound to rhodamine".

Rhodamine is a fluorescent dye that used to be used more than it is nowadays to stain cells, typically in immunofluorescence procedures.  Cells would be stained with an antibody to a particular protein, then with a rhodamine-conjugated secondary antibody, so that the location of the protein in question could be visualized by fluorescence microscopy.