n. a degree on the Fahrenheit scale of temperature
n. a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
n. the capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and a voltage difference of 1 volt between the plates
abbr. 灭火系统（Fire Suppression System）；飞点扫描设备, 飞点析象器（Flying-Spot Scanner）；联邦供应处（Federal Supply Service）