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Weak; feeble; limp; slight; vain; without strength or solidity; of loose and unsubstantial structure; without reason or plausibility; as, a flimsy argument, excuse, objection. Proud of a vast extent of flimsy lines. Pope. All the flimsy furniture of a country miss's brain. Sheridan.

tones. -- Flint mill. (a) (Pottery) A mill in which flints are ground. (b) (Mining) An obsolete appliance for lighting the miner at his work, in which flints on a revolving wheel were made to produce a shower of sparks, which gave light, but did not inflame the fire damp. Knight. -- Flint stone, a hard, siliceous sto…

arrangement of the minute crystals shows the lines of flow of thew molten material before solidification; -- also called fluxion structure.

of being fluid or capable of flowing; a liquid, aëriform. or gaseous state; -- opposed to solidity. It was this want of organization, this looseness and fluidity of the new movement, that made it penetrate through every class of society. J. R. Green.

luorine and boron. Fluoridic acid (Chem.), a double fluoride, consisting essentially of a solution of boron fluoride, in hydrofluoric acid. It has strong acid properties, and is the type of the borofluorides. Called also borofluoric acid.

orcin; -- 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.

luorine. 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.

Flowing; also, wanting solidity. B. Jonson.

ode rays are focused upon the anticathode, for intensifying the effect. -- Principal, or Solar, focus (Opt.), the focus for parallel rays.

A weight by which lead and some other metals were formerly sold, in England, varying from 19 [Obs.]

A kind of soft sweetmeat made by boiling solutions to the point of crystallization, usually molded; as, cherry fondant.

Soldiers who march and fight on foot; the infantry, usually designated as the foot, in distinction from the cavalry. "Both horse and foot." Milton.

A band of foot soldiers. [Obs.]

Infantry soldiers belonging to select regiments called the Guards. [Eng.]

A soldier who marches and fights on foot; a foot soldier.

To provide with forces; to reënforce; to strengthen by soldiers; to man; to garrison. [Obs.] Shak.

A pump having a solid piston, or plunger, for drawing and forcing a liquid, as water, through the valves; in distinction from a pump having a bucket, or valved piston.

The solid piston of a force pump; the instrument by which water is forced in a pump.

A lost, forsaken, or solitary person. Forced to live in Scotland a forlorn. Shak.

f planes included under a general crystallographic symbol. It is not necessarily a closed solid.