MFD stands for Multiparameter Fluorescence Detection. A MFD experimentis essentially a time-resolved fluorescence experiment which probes the absorption and fluorescence, the fluorescence quantum yield, the fluorescence lifetime, and the anisotropy of the studied chromophores simulatanously.1

K├╝hnemuth R, Seidel CAM. Principles of Single Molecule Multiparameter Fluorescence Spectroscopy. S. 2001;2(4):251-254. doi: 10.1002/1438-5171(200112)2:4<251::aid-simo251>;2-t [Source]