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Fluff

To make a mistake in the performance of; -- used mostly of lines in a drama; as, he fluffed the last line of the act.

Fluffy

Pertaining to, or resembling, fluff or nap; soft and downy.

Fluid

A fluid substance; a body whose particles move easily among themselves.

Fluidal

Pertaining to a fluid, or to its flowing motion.

Fluidity

The quality of being fluid or capable of flowing; a liquid, a/riform, or gaseous state; -- opposed to solidity.

Fluke

To get or score by a fluke; as, to fluke a play in billiards.

Fluky

Formed like, or having, a fluke.

Flume

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

Pertaining to rivers; abounding in streama.

Flummery

A light kind of food, formerly made of flour or meal; a sort of pap.

Flung

imp. p. p. of Fling.

Flunk

A failure or backing out a total failure in a recitation.

flunk out

to be dismissed (from a school or course of study) due to failure to perform up to the minimum standard.

Flunky

A contemptuous name for a liveried servant or a footman.

Flunlyism

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

Fluoboric

Pertaining to, derived from, or consisting of, fluorine and boron.

Fluocerite Fluocerine

A fluoride of cerium, occuring near Fahlun in Sweden. Tynosite, from Colorado, is probably the same mineral.

Fluoranthene

A white crystalline hydrocarbon C15H10, of a complex structure, found as one ingredient of the higher boiling portion of coal tar.

Fluorated

Combined with fluorine; subjected to the action of fluoride.

Fluorene

A colorless, crystalline hydrocarbon, C13H10 having a beautiful violet fluorescence; whence its name. It occurs in the higher boiling products of coal tar, and is obtained artificially.

fluorescein fluoresceine

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.

Fluorescence

A luminescence emitted by certain substances due to the absorption of radiation at one wavelength, and the almost instantaneous re-emission of radiation at another, usually longer wavelength. The re-radiation stops almost as soon as the incident radiation is halted, thus distinguishing this phenomenon from phosphorescence, in which re-radiation of light may continue for some time after the incident radiation is halted.

Fluorescin

A colorless, amorphous substance which is produced by the reduction of fluoresce/n, and from which the latter may be formed by oxidation.

Fluoric

Pertaining to, obtained from, or containing, fluorine.

fluoridate

To subject to fluoridation, as of water; to add fluoride to.

fluoridation

The addition of a fluoride to the water supply (to prevent dental decay).

Fluoride

A binary compound of fluorine with another element or radical.

fluoridization

the addition of a fluoride to the water supply (to prevent dental decay).

fluoridize

to subject to fluoridation, as of water.

Fluorine

A non-metallic, gaseous element of atomic number 9, 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, but may be contained in lead vessels. If set free it immediately attacks a containing glass vessel, so that it was not isolated until 1886. It is a pungent, corrosive, colorless gas. Symbol F. Atomic weight 19.00.

Fluorite

Calcium fluoride (CaF2), 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.

fluorochrome

Any of various fluorescent substances used in fluorescence microscopy to stain specimens.

Fluoroid

A tetrahexahedron; -- so called because it is a common form of fluorite.

Fluoroscope

An instrument for observing or exhibiting fluorescence.

Fluoroscopy

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.

Fluosilicate

A double fluoride of silicon and some other (usually basic) element or radical, regarded as a salt of fluosilicic acid; -- called also silicofluoride.

Fluosilicic

Composed of, or derived from, silicon and fluorine.

Flurry

To put in a state of agitation; to excite or alarm.

Flush

So as to be level or even.

Flusher

A workman employed in cleaning sewers by flushing them with water.

Flushing

A heavy, coarse cloth manufactured from shoddy; -- commonly in the /

Flushness

The state of being flush; abundance.

Fluster

Heat or glow, as from drinking; agitation mingled with confusion; disorder.

Flusteration

The act of flustering, or the state of being flustered; fluster.

Flute

To play, whistle, or sing with a clear, soft note, like that of a flute.

Fluted

Thin; fine; clear and mellow; flutelike; as, fluted notes.

Flutemouth

A fish of the genus Aulostoma, having a much elongated tubular snout.

Fluter

One who plays on the flute; a flutist or flautist.

Fluting

Decoration by means of flutes or channels; a flute, or flutes collectively; as, the fluting of a column or pilaster; the fluting of a lady's ruffle.

Flutist

A performer on the flute; a flautist.

Flutter

The act of fluttering; quick and irregular motion; vibration; as, the flutter of a fan.

Fluty

Soft and clear in tone, like a flute.

Fluvial

Belonging to rivers; growing or living in streams or ponds; as, a fluvial plant.

Fluvialist

One who exlpains geological phenomena by the action of streams.

Fluviatic

Belonging to rivers or streams; fluviatile.

Fluviatile

Belonging to rivers or streams; existing in or about rivers; produced by river action; fluvial; as, fluviatile starta, plants.

Fluvio-marine

Formed by the joint action of a river and the sea, as deposits at the mouths of rivers.

Fluviograph

An instrument for measuring and recording automatically the rise and fall of a river.

Fluviometer

An instrument for measuring the height of water in a river; a river gauge.

Flux

To affect, or bring to a certain state, by flux.

Fluxible

Capable of being melted or fused, as a mineral.

Fluxional

Pertaining to, or having the nature of, fluxion or fluxions; variable; inconstant.

Fluxive

Flowing; also, wanting solidity.

Fly

Knowing; wide awake; fully understanding another's meaning.

Fly-bitten

Marked by, or as if by, the bite of flies.

Fly-case

The covering of an insect, esp. the elytra of beetles.

Fly-catching

Having the habit of catching insects on the wing.

Flyaway

Disposed to fly away; flighty; unrestrained; light and free; -- used of both persons and things. A flyaway person or thing.

Flybane

A kind of catchfly of the genus Silene; also, a poisonous mushroom (Agaricus muscarius); fly agaric.

Flyblow

One of the eggs or young larv/ deposited by a flesh fly, or blowfly.

Flyblown

Tainted or contaminated with flyblows; damaged; foul.

Flyboat

A large Dutch coasting vessel.

Flycatcher

One of numerous species of birds that feed upon insects, which they take on the wing.

Flyer

One that uses wings.

Flyfish

A California scorp/noid fish (Sebastichthys rhodochloris), having brilliant colors.

Flying

Moving in the air with, or as with, wings; moving lightly or rapidly; intended for rapid movement.

flyleaf

A blank leaf in the front of back or a book.

Flyman

The driver of a fly, or light public carriage.

flyover

the upper level of a crossing of two highways at different levels; called in the United States an overpass; as, an overpass is called a flyover or a flypast in England.

flypaper

A strip of paper that is coated with a sticky substance and suspended from an overhead object to trap and kill flies; also, a similar paper poisoned so as to kill flies on contact.

flypast

the upper level of a crossing of two highways at different levels; same as flyover; called in the United States an overpass.

Flysch

A name given to the series of sandstones and schists overlying the true nummulitic formation in the Alps, and included in the Eocene Tertiary.

flyswatter flyswat

An implement with a flat part (a mesh of metal or plastic) and a long handle, used to kill insects by striking them. The handle is typically about one foot long and the flat mesh at the end (usually of plastic) is about 5 inces square.

Flyte Flite

Strife; dispute; abusive or upbraiding talk, as in fliting; wrangling.

Flytting Flitting

Contention; strife; scolding; specif., a kind of metrical contest between two persons, popular in Scotland in the 16th century.

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