FENCE MONTH n.
les a large area, or a whole estate, within one inclosure. -- Worm fence, a zigzag fence composed of rails crossing one another at their ends; -- called also snake fence, or Virginia rail fence. -- To be on the fence, to be undecided or uncommitted in respect to two opposing parties or policies. [Colloq.]…
FILTER n.
, a similar device for purifying air. Filter bed, a pond, the bottom of which is a filter composed of sand gravel. -- Filter gallery, an underground gallery or tunnel, alongside of a stream, to collect the water that filters through the intervening sand and gravel; -- called also infiltration gallery.…
FLINTY a.
Consisting of, composed of, abounding in, or resembling, flint; as, a flinty rock; flinty ground; a flinty heart. Flinty rockFlinty state, a siliceous slate; -- basanite is here included. See Basanite.
FLUOSILICIC a.
Composed of, or derived from, silicon and fluorine. Fluosilicic acid, a double fluoride of hydrogen and silicon, H2F6Si, obtained in solution in water as a sour fuming liquid, and regarded as the type of the fluosilicates; -- called also silicofluoric acid, and hydrofluosilicic acid.