FLAG n.
An aquatic plant, with long, ensiform leaves, belonging to either of the genera Iris and Acorus. Cooper's flag, the cat-tail (Typha latifolia), the long leaves of which are placed between the staves of barrels to make the latter water-tight. -- Corn flag. See under 2d Corn. -- Flag broom, a coarse of broom, originall…
FLEA n.
An insect belonging to the genus Pulex, of the order Aphaniptera. Fleas are destitute of wings, but have the power of leaping energetically. The bite is poisonous to most persons. The human flea (Pulex irritans), abundant in Europe, is rare in America, where the dog flea (P. canis) takes its place. See Aphaniptera, and…
FLORENTINE a.
Belonging or relating to Florence, in Italy. Florentine mosaic, a mosaic of hard or semiprecious stones, often so chosen and arranged that their natural colors represent leaves, flowers, and the like, inlaid in a background, usually of black or white marble.
FOCAL a.
Belonging to,or concerning, a focus; as, a focal point. Focal distance, or length,of a lens or mirror (Opt.), the distance of the focus from the surface of the lens or mirror, or more exactly, in the case of a lens, from its optical center. --Focal distance of a telescope, the distance of the image of an object from th…
FOREST n.
A large extent or precinct of country, generally waste and woody, belonging to the sovereign, set apart for the keeping of game for his use, not inclosed, but distinguished by certain limits, and protected by certain laws, courts, and officers of its own. Burrill.