FLEMISH a.
d color on one side. -- Flemish bond. (Arch.) See Bond, n., 8. -- Flemish brick, a hard yellow paving brick. -- Flemish coil, a flat coil of rope with the end in the center and the turns lying against, without riding over, each other. -- Flemish eye (Naut.), an eye formed at the end of a rope by dividing the strand…
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.…
FLUORITE n.
Calcium fluoride, a mineral of many different colors, white, yellow, purple, green, red, etc., often very beautiful, crystallizing commonly in cubes with perfect octahedral cleavage; also massive. It is used as a flux. Some varieties are used for ornamental vessels. Also called fluor spar, or simply fluor.…
FLY AMANITA; FLY FUNGUS n.
nous 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.
FRANGULIC; FRANGULINIC a.
frangulin, or a species (Rhamnus Frangula) of the buckthorn. Frangulinic acid (Chem.), a yellow crystalline substance, resembling alizarin, and obtained by the decomposition of frangulin.