Flukan noun (Mining) Flucan.

Fluke (flūk) noun [ Confer Anglo-Saxon flōc a kind of flatfish, Icelandic flōki a kind of halibut.]
1. (Zoology) The European flounder. See Flounder . [ Written also fleuk , flook , and flowk ].
[ 1913 Webster]

2. (Zoology) A parasitic trematode worm of several species, having a flat, lanceolate body and two suckers. Two species ( Fasciola hepatica and Distoma lanceolatum ) are found in the livers of sheep, and produce the disease called rot .
[ 1913 Webster]

Fluke (flūk) noun [ Confer LG. flunk , flunka wing, the palm of an anchor; perhaps akin to English fly .]
1. The part of an anchor which fastens in the ground; a flook. See Anchor .

2. (Zoology) One of the lobes of a whale's tail, so called from the resemblance to the fluke of an anchor.

3. An instrument for cleaning out a hole drilled in stone for blasting.

4. An accidental and favorable stroke at billiards (called a scratch in the United States); hence, any accidental or unexpected advantage; as, he won by a fluke . [ Cant, Eng.] A. Trollope.

Fluke transitive verb & i. [ imperfect & past participle Fluked ; present participle & verbal noun Fluking .] To get or score by a fluke; as, to fluke a play in billiards. [ Slang]

Flukeworm noun (Zoology) Same as 1st Fluke , 2.

Fluky adjective Formed like, or having, a fluke.

Flume noun [ Confer Middle English flum river, OF, flum , from Latin flumen , from fluere to flow. √84. See Fluent .] A stream; especially, a passage channel, or conduit for the water that drives a mill wheel; or an artifical channel of water for hydraulic or placer mining; also, a chute for conveying logs or lumber down a declivity.

Fluminous adjective [ Latin flumen , fluminis , river.] Pertaining to rivers; abounding in streama.

Flummery noun [ W. llumru , or llumruwd , a kind of food made of oatmeal steeped in water until it has turned sour, from llumrig harsh, raw, crude, from llum sharp, severe.]
1. A light kind of food, formerly made of flour or meal; a sort of pap.

Milk and flummery are very fit for children.

Locke.

2. Something insipid, or not worth having; empty compliment; trash; unsubstantial talk of writing.

The flummery of modern criticism.

J. Morley.

Flung imperfect & past participle of Fling .

Flunk (flŭnk) intransitive verb [ imperfect & past participle Flunked (flŭnkt); present participle & verbal noun Flunking .] [ Confer Funk .] To fail, as on a lesson; to back out, as from an undertaking, through fear.

Flunk transitive verb To fail in; to shirk, as a task or duty. [ Colloq. U.S.]

Flunk noun A failure or backing out ; specifically (College cant), a total failure in a recitation. [ U.S.]

Flunky (flŭn"kȳ) noun ; plural Flunkies (- kĭz). [ Prob. from or akin to flank .] [ Written also flunkey .]
1. A contemptuous name for a liveried servant or a footman.

2. One who is obsequious or cringing; a snob.

3. One easily deceived in buying stocks; an inexperienced and unwary jobber. [ Cant, U.S.]

Flunkydom noun The place or region of flunkies. C. Kingsley.

Flunlyism noun The quality or characteristics of a flunky; readiness to cringe to those who are superior in wealth or position; toadyism. Thackeray.

Fluo- (Chemistry) A combining form indicating fluorine as an ingredient; as in fluo silicate, fluo benzene.

Fluoborate noun [ Confer French fluoborate .] (Chemistry) A salt of fluoboric acid; a fluoboride.

Fluoboric adjective [ Fluo- boric : confer French fluoborique .] (Chemistry) Pertaining to, derived from, or consisting of, fluorine and boron.

Fluoridic acid (Chemistry) , 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 .

Fluoboride noun (Chemistry) See Borofluoride .

Fluocerine, Fluocerite noun [ Fluo- + cerium .] (Min.) A fluoride of cerium, occuring near Fahlun in Sweden. Tynosite, from Colorado, is probably the same mineral.

Fluohydric adjective [ Fluo- + hydro gen.] (Chemistry) See Hydrofluoric .

Fluophosphate noun [ Fluo- + phosphate .] (Chemistry) A double salt of fluoric and phosphoric acids.

Fluor noun [ Latin , a flowing, from fluere to flow. See Fluent .]
1. A fluid state. [ Obsolete] Sir I. Newton.

2. Menstrual flux; catamenia; menses. [ Obsolete]

3. (Min.) See Fluorite .

Fluor albus [ Latin , white flow.] (Medicine) The whites; leucorrhæa.

Fluor spar (Min.) See Fluorite .

Fluoranthene noun [ Fluor ene + anth racene.] (Chemistry) A white crystalline hydrocarbon C ₁₅ H ₁₀ , of a complex structure, found as one ingredient of the higher boiling portion of coal tar.

Fluorated adjective (Chemistry) Combined with fluorine; subjected to the action of fluoride. [ R.]

Fluorene noun (Chemistry) A colorless, crystalline hydrocarbon, C ₁₃ H ₁₀ having a beautiful violet fluorescence ; whence its name. It occurs in the higher boiling products of coal tar, and is obtained artificially.

Fluorescein noun (Chemistry) A yellowish red, crystalline substance, C ₂₀ H ₁₂ O ₅ , 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 .

Fluorescence noun [ From Fluor .] (Opt.) That property which some transparent bodies have of producing at their surface, or within their substance, light different in color from the mass of the material, as when green crystals of fluor spar afford blue reflections. It is due not to the difference in the color of a distinct surface layer, but to the power which the substance has of modifying the light incident upon it. The light emitted by fluorescent substances is in general of lower refrangibility than the incident light. Stockes.

Fluorescence noun A property possessed by fluor spar, uranium glass, sulphide of calcium, and many other substances, of glowing without appreciable rise of temperature when exposed to light or to ultra-violet rays, cathode rays, X rays, etc.

Fluorescent adjective Having the property of fluorescence.

Fluorescin noun (Chemistry) A colorless, amorphous substance which is produced by the reduction of fluoresceïn, and from which the latter may be formed by oxidation.

Fluoric adjective [ Confer French fluorique .] (Chemistry) Pertaining to, obtained from, or containing, fluorine.

Fluoride noun [ Confer French fluoride .] (Chemistry) A binary compound of fluorine with another element or radical.

Calcium fluoride (Min.) , fluorite, CaF ₂ . See Fluorite .

Fluorine (flū"ŏr*ĭn or -ēn; 104) noun [ New Latin fluorina : confer German fluorin , French fluorine . So called from its occurrence in the mineral fluorite .] (Chemistry) A non-metallic, gaseous element, strongly acid or negative, and associated with chlorine, bromine, and iodine, in the halogen group of which it is the first member. It always occurs combined, is very active chemically, and possesses such an avidity for most elements, and silicon especially, that it can neither be prepared nor kept in glass vessels. If set free it immediately attacks the containing material, so that it was not isolated until 1886. It is a pungent, corrosive, colorless gas. Symbol F. Atomic weight 19.

» Fluorine unites with hydrogen to form hydrofluoric acid, which is the agent employed in etching glass. It occurs naturally, principally combined as calcium fluoride in fluorite , and as a double fluoride of aluminium and sodium in cryolite .

Fluorite noun (Min.) 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 .

Fluoroid noun [ Fluor + - oid .] (Crystallog.) A tetrahexahedron; -- so called because it is a common form of fluorite.

Fluoroscope noun [ Fluor escence + -scope .] (Physics ) An instrument for observing or exhibiting fluorescence.

Fluoroscope noun (Physics) A fluorescent screen, with hood to protect the eyes, used for observing the shadows cast by objects placed in the path of the X rays. -- Flu*or`o*scop"ic adjective

Fluoroscopy noun Examination of an object, as the human body, by exposing it to the X rays and observing the shadow cast upon a fluorescent screen; cryptoscopy.

Fluorous adjective Pertaining to fluor.

Fluosilicate noun [ Confer French fluosilicate .] (Chemistry) A double fluoride of silicon and some other (usually basic) element or radical, regarded as a salt of fluosilicic acid ; -- called also silicofluoride .

Fluosilicic adjective [ Fluo- + silicic : confer French fluosilicique .] (Chemistry) Composed of, or derived from, silicon and fluorine.

Fluosilicic acid , a double fluoride of hydrogen and silicon, H ₂ F ₆ Si, 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 .

Flurried adjective Agitated; excited. -- Flur"ried*ly adverb

Flurry noun ; plural Flurries . [ Prov. English flur to ruffle.]
1. A sudden and brief blast or gust; a light, temporary breeze; as, a flurry of wind.

2. A light shower or snowfall accompanied with wind.

Like a flurry of snow on the whistling wind.

Longfellow.

3. Violent agitation; commotion; bustle; hurry.

The racket and flurry of London.

Blakw. Mag.

4. The violent spasms of a dying whale.

Flurry transitive verb [ imperfect & past participle Flurried ; present participle & verbal noun Flurrying .] To put in a state of agitation; to excite or alarm. H. Swinburne.

Flurt noun A flirt. [ Obsolete] Quarles.