Definition of fimbriae:
(n) :
(bacteriology) A hairlike appendage found on the cell surface of many bacteria; used by the bacteria to adhere to one another, to animal cells and to some inanimate objects.
(n) :
(anatomy, usually in the plural) An individual thread in a fimbria, especially a fingerlike projection around the ovarian end of the Fallopian tube.
(n) :
(biology) A series of threads or other projections resembling a fringe.