FLUORESCEIN n.
A yellowish red, crystalline substance, C20H12O5, produced by heating together phthalic anhydride and resorcin; -- so called, from the very brilliant yellowish green fluorescence of its alkaline solutions. It has acid properties, and its salts of the alkalies are known to the trade under the name of uranin.…
FLY AMANITA; FLY FUNGUS n.
mushroom (Amanita muscaria, syn. Agaricus muscarius), having usually a bright red or yellowish cap covered with irregular white spots. It has a distinct volva at the base, generally an upper ring on the stalk, and white spores. Called also fly agaric, deadly amanita.
FULAHS; FOOLAHS n.
ro tribes, inhabiting an extensive region of Western Soudan. Their color is brown or yellowish bronze. They are Mohammedans. Called also Fellatahs, Foulahs, and Fellani. Fulah is also used adjectively; as, Fulah empire, tribes, language.