Note: I do not know the definition of
"flowrate" within the phrase "flow rate/area
mass basis".  The following sound alike: flow
rate to length mass basis, flow rate area
mass basis, flow rate to length volume basis,
flow rate mass basis, flow rate mole basis,
flow rate to area volume basis, flow rate
volume basis.  The following partially match:
fl oz, flux of displacement, fluidity, fl
head, flam, flux linkage, fl dr, fl dram,
fluid dr, fluid dram, fluid oz.