flue 
Mill. To thr olil ami raided city nf Leicester, Inrac .-in. I 
pleasantly situated, lint de.-picably built, ye cllilllll' 
like so niiiny smith's forges. 
E>-'i>iit, Memoirs, Aug. i>, 10">4. 
lie wrote on a pane of glass how I'd climb, if the way I 
only knew. 
And she writ beneath, if your heart's afcarcd. dmi't ven- 
ture nji the jlii,-. //</, Tin- Sweep's Complaint, 
(r) A pipe or tube tor conveying heat to water in certain 
kinds of strain boilers. (</) A pa aue in a wall for the 
purpose of conducting heated air from one part of a build- 
ing to another. 
2. [See etym.] The winding hollow of a sea- 
shell. [Hare.] 
Him Tryton combroiu bare, that galeon blew with whclkid 
shell, 
Whose wrinckly wreathed fine [Latin conAa] did fearful 
shril in seas outyell. Phaff, ,<Eneid, x. 
3. In tiri/iin-liiiilding, a flute-pipe as distin- 
guished from a mouth-pipe or reed-pipe. 4. 
The coping of a gable or end-wall of a house, 
etc. Halliwcll. [Prov. Eng.] Dead flue, a Hue 
which is no longer usei I. Flash-flue, a form of flue, with- 
out turns or obstructions, for a steam-boiler. 
flue' 2 (flo), v. i. ; pret. and pp. flited, ppr. fitting. 
[Appar. < fluel, ., the entrance of a flue being 
usually expanded or splayed.] To expand or 
splay, as the jambs of a window. 
flue 3 (flo), . [Also written flew (fletfi). Ori- 
gin uncertain ; the nearest form outside of E. 
is LG. flog, anything light that floats in the air, 
flocks of wool, etc. fas if < l&.flegen = E. fly*) ; 
but this mingles vrithflok, in the same sense, 
= E. flock 2 ; so E. dial, flnok, fluke, equiv. to 
flue*. The form fluff, also spelled flough (f), 
points to an orig. guttural (W. llioch, dust, pow- 
der ?). Cf. Dan. fnitg = Sw. fnugg, down, 
motes, flue, Dan. fnok, pappus. The incom- 
plete evidence points to two or more different 
sources for these words. ] Down or nap ; waste 
downy matter, abounding in spinnenes, lint- 
factories, etc. ; downy refuse ; fine hair, fea- 
thers, flocks of cotton, etc., that cling to clothes. 
flue 4 , flew 3 (flo), a. [< tilE.flew, shallow; origin 
obscure.] Shallow. Halliwell; Huloet. [Prov. 
Eng.] 
Flew, or scholde [shoalj, as vessel or other lyke, bassus. 
Prompt. Parv., p. 167. 
flue 5 (flo), n. [Corrupted trora.flulce.'} In whal- 
ing, the fluke or barb of a harpoon. 
flue 8 (flo), n. [Morocco.] A money of account 
of Morocco, of the value of one twenty-fifth of 
an English penny, or one thirteenth of a cent. 
flue 7 (So), w. [Appar. an arbitrary reduction 
of influenza.'] Influenza. [Rare.] 
I have had a pretty fair share of the flue, and believe I 
am now well rid of it at last. 
Southey, Letters, IV. 574, 1839. 
flue-boiler (flo'boi"ler), n. A steam-boiler with 
flues or heat-pipes running through the part 
that contains the water. 
flue-bridge (flo'brij), n. In metal., the low wall 
of fire-brick, at the end opposite the fire-bridge, 
separating the hearth of the furnace from the 
flue. 
flue-brush (flo'brush), n. A brush made of 
strips of wire or steel used to cleanse the inte- 
rior of a flue from scales and soot. 
flue-cinder (flo'sin^der), n. Metal cinder or 
slag obtained in the reheating or balling fur- 
nace in the process of working puddled bar 
into merchant-iron. 
flued (flod), a. [< flueS + -e<lt.~] In whaling, 
fluked ; barbed ; having a fluke or flue, as a har- 
poon : usually in composition : as, one-flued ; 
two-flued. 
flueful (flo'ful), a. [Appar. <fluel + -ful; as if 
'full to the flue or chimney.'] Brimful. [Prov. 
Eng.] 
flue-hammer (fl8'ham"er), n. [<JflM> + ham- 
mer.'] A coopers' hammer the peen of which 
has a working edge whose length is in the plane 
of the sweep of the hammer. It is used to spread 
or flare one edge of an iron hoop to make it fit the bulge 
of a cask. 
fhiellent, [Also written fluellin; said to be of 
W. origin, < FluelUn (as in Shakspere), a form 
of Llewelyn, a proper name. Cf. D.fluweel, vel- 
vet, fluweelbloem, amaranth (lit. 'velvet-flow- 
er': see velvet-flower and floramour).] An old 
name for the plant Veronica officinalis. Female 
fHiellen, the Linaria spuria. 
fluellite (flo 'el-It), n. [Irreg. < fluor + GT. 
Ai'flof, a stone.] Native fluoride of aluminium 
occurring at Stenna-gwyn, in Cornwall, in oc- 
tahedral crystals. 
fluencet (flo" ens), n. [= P. flueuce = Pg. fluen- 
cia, < it.fluentia, a flowing, fluency, < flnen(t-)s, 
ppr. of fluere, flow : see fluent.'] 1. A flo wing; 
a stream. Davies. 
That he first clid daH 
With sulphur, then with jlm of sweetest water rain. 
( '/ifi,>,,i n, Iliad, xvi. ^L'l. 
2. Fluency. 
He is conceited to have a volnlile and .smart ilin'n, I 
tongne. Mllt,i. On Uef. of Iliiiulj. Remonst., Pref. 
fluency (flo'en-si), . [See fluence.] 1. The 
quality of being fluent, (a) The quality of being 
flowing or changeable : opposed to ,-i:/i</i(:i. 
An arbitrary rule, an institution, must be opposed to 
the jlttencif, the ever-changing relations, of nature ;nnl 
fact. Miinl, IX. 3%. 
(6) Readiness and smoothness of utterance ; volubility. 
Unpremeditated prayers, uttered with great jtn, am, 
with a devout warmth and earnestness, are apt to make 
strong and awakening impressions on the minds <>i the 
generality of hearers. Bp. AHerbimj, Sermons, II. xx. 
A man of weak capacity, with fliiency of speech, tri- 
umphs in outrunning you. Steele, Tatler, No. 244. 
2f. Affluence; abundance. 
Those who grow old in fluency and ease. 
Sandys, Paraphrase of Job. 
= Syn. Glibness, facility, readiness, 
fluent (flo'ent), a. and n. [< L. fluen(t~)s, ppr. 
of fluere, pp. fluxus, flow, = Or. 0/rav, swell, 
overflow, ava-^Avetv, spout up. Not related to 
E.^oiri. Hence ult. (< L. fluere) E. fluid, flux, 
fluctuate, etc., flotsam, flume, affluent, effluent, 
influent, refluent, etc.] I. a. 1. Flowing or ca- 
pable of flowing; having a flowing motion, or 
an appearance as of flowing; changeable; not 
rigid. 
Motion being & fluent thing, . . . It doth not follow that 
Ijecause anything moves this moment it must do so the 
next. Kay, Works of Creation. 
Broad brows and fair, a fluent hair and fine, 
High nose, a nostril large and fine, and hands 
Large, fair, and line. 
'/'.;.,-./..;, Gareth and Lynette. 
I never had dreamed of such delicate motion, fluent and 
graceful. R. D. Blackmore, Lorna Doone, x. 
Morality is not a matter of goodness, but of true relation 
to facts a relation which must be fluent, which cannot 
be rigid. Mind, IX. 385. 
2. Ready in the use of words ; using words 
with facility ; voluble : as, a fluent speaker or 
writer. 
Not but the tragic spirit was our own, 
And full in Shakespear, fair in Otway shone : 
But Otway fail'd to polish or refine, 
And fluent Shakespear scarce effaced a line. 
Pope, Imit. of Horace, II. i. 279. 
Once on the theme of her own merits, Mademoiselle 
WAS fluent. Charlotte Bronte, Shirley, vi. 
3. Proceeding from a faculty of ready copious 
speech ; marked by copiousness of speech : as, 
fluent utterance ; affluent style. 
How iii<> : ,it nonsense trickles from his tongue ' 
How sweet the periods, neither said nor sung ! 
Pope, Dunciad, ill. 201. 
II. n. If. A stream; a current of water. 
Confiding in their hands, that sed'lous strive 
To cut the outrageous fluent. J. Philips, Blenheim. 
2. In the doctrine of fluxions, the variable or 
flowing quantity in fluxions which is continu- 
ally increasing or decreasing; an integral. See 
fluxion Contemporary fluents, functions of the 
same independent variable. - Correction of a fluent. 
See correction. Fluent by continuation, an expression 
for the fluent of a fluxion deduced from the expression for 
the fluent of another fluxion. Fluent by series, the ex- 
pression of the fluent of a fluxion in the form of an infi- 
nite series. Fluent of a fluxion, the integral of a func- 
tion as conceived in the doctrine of fluxions. 
fluential (flo-en'shal), a. Pertaining to or of 
the nature of a fluent, 
fluently (flo'ent-li), adv. In a fluent manner. 
For when this humour of medisance sprlngeth in the 
head of the company, it runnes fluently in to the less no- 
ble parts. W. Montague, Devonte Essays, ii. 2. 
fluentness (flo'ent-nes), it. The state of being 
fluent; fluency'.' 
The fluent ness and consistencie of time has not this in- 
convenience, to deny us the taking a dimention of it. 
W. ifontayue, Devoute Essays, II. xii. 3. 
flue-plate (flo" plat), n. In steam-boilers, a plate 
in which the ends of flues or tubes are set. 
Also called tube-plate and tube-sheet. 
flue-stop (flo'stop), n. In organ-building, a stop 
whose tone is produced by the impact of a stream 
of air upon a sharp edge : a generic name for 
all stops not reed-stops. Also flute-stop. 
flue-surface (flo'ser'fas), n. The part of the 
surface of a steam-boiler heated by flues, as 
distinguished from that part which is heated 
directly by the furnace. 
flue-work (flo'werk), n. In organ-building, all 
the flue-stops taken together, in distinction 
from the reed-stops or reed-work. Also flute- 
work. 
fluid 
fluey (fto'i), . [</we3 + -)/!.] Resembling or 
containing flue, or loose fur or soft down ; 
downy ; fluffy. 
I had the luggage out within a <la> or two. ... It was 
all very dusty and/tup. i/<c<v,<, Somebody's Luggage, i. 
fluff 1 (fluf), ". [Also written flonyh (?); con- 
nection vrithflueS uncertain: see flue 3 , and cf. 
.''(f 2 .] 1. Light down or nap such as rises 
from cotton, beds, etc., when agitated; flue. 
In Italy there are old crones so haggard that it is hanl 
not to believe them created just as crooked and foul and 
full of flu/ and years as you behold them. 
Hou'ells, Venetian Life, vii. 
2. Something downy or fluffy. 
Tiny fluffs of feathered life Isnow-binlsJ. 
Lnwell, Study Windows, p. 61. 
He [T'lisonl proposed to introduce into the circuit a 
cell containing carbon powder, the pressure on which 
could be varied by the vibrations of a diaphragm. He 
sometimes held the carbon powder against the diaphragm 
in a small shallow cell, . . . and sometimes he used what 
he describes as a_/iu^-*that is, a little brush of silk fibre 
with plumbago rubbed into it. Encyc. Brit., XXIII. 129. 
fluff 1 (fluf), v. t. [< fluffs, .] To treat with 
fluff or powder. 
The flesh side [of leather blackened and dressed on the 
grain side] is whitened or flu/ed, and the grain is treated 
with sweet oil or some similar oil, and finally glazed with 
a thin solution of gelatin or of shellac. 
Knci/c. Brit., XIV. 387. 
fluff 2 (fluf), n. [Perhaps imitative, like puff, 
q. v.] 1. A puff . [Scotch.] 
I'm sure an ye warna a fish or something war, ye could 
never a' keepit ae flu/ o' breath in the body o' ye in aneath 
the lock. Saint Patrick, III. 31. (Jamieson.) 
2. A slight explosion of gunpowder. A fluff In 
the pant, an explosion of priming in the lock-pan of a Hint - 
lock gun, while the gun itself does not go off ; figuratively, 
any Ineffectual, short, spasmodic effort which dies in the 
attempt ; a flash in the pan. 
fluff 2 (fluf), r. t. [See the noun.] To cause to 
puff To fluff powder*, to burn gunpowder. 
fluff-gib (fluf 'jib), n. A squib. [Scotch.] 
Vi i [< o' this unlawfu' wark, u i fighting, and flashes, ami 
fluf-rfibs, disturbing the king's peace, and disarming his 
soldiers. Scott, Rob Hoy, xxxi. 
fluffiness (fluf 'i-nes), n. The state or quality of 
being fluffy ; flocculence. 
This flujfiness and laxity of the plumage. 
Coues, Key to N. A. Birds. 
fluffy (fluf'i), a. [< fluff* + -yi.] Composed 
of, containing, or resembling fluff or loose floc- 
culent matter, as nap or down ; giving off loose 
floating particles when agitated ; fluey. 
The carpets were fluffy. Thackeray. 
It was the solid compressed weight of gold compared 
with the fluffy bulk of feathers. Cornhill Hag. 
fliigelhorn (flU'gl-h6rn), n. [G., < fliigel, a wing 
(see fugleman), + horn = E. /torn.] 1. A hunt- 
ing-horn. 2. A kind of bugle. 
flugelman (flo'gl-man), n. Same as fugleman. 
fluiblet (flo'i-bl), a. " [< L. fluere, flow, + -ible.] 
Capable of flowing ; fluid. 
As the waters also were earthie, and the earth fluible. 
Purchas, Pilgrimage, p. 8. 
fluid (flS'id), a. and n. [= F. fluide = Sp. fluido 
= Pg. It. fluido, < L. fluidus, flowing, fluid, < 
fluere, flow: see fluent.] I. o. 1. Capable of 
flowing; liquid or gaseous; consisting of a sub- 
stance incapable of resisting forces (tangential 
stresses) tending to change its shape. 
That pow'rful Juice, with which no Cold dares mix, 
Which still is fluid. Congreve, Imit. of Horace, I. ix. 2. 
Transparent forms, too fine for mortal sight, 
Their fluid bodies half dissolved in light. 
Pope, R. of the L., ii. 62. 
2. Not fixed or rigid ; flowing; shifting; fluent. 
Thought, feeling, sentiment, language, metre ; all the 
elements of their art are fluid, copious, untrammelled, 
poured forth from a richly abundant vein. 
Fortnightly Rev., N. S., XL. 335. 
Fluid compass, a compass the card of which revolves in 
a bowl of alcohol on which it floats. See compass. 7. 
Fluid dram, fluid ounce. See the nouns. Fluid ex- 
tracts. See extract, 2. Fluid Inclusion, a liquid in- 
closed in a cavity, usually very minute, in a mineral : thus, 
smoky quartz often contains fluid inclusions of liquid car- 
bon dioxid. Fluid lens, a lens made by confining a li- 
quid between two curved pieces of glass. 
II. n. 1. A substance which flows or is capa- 
ble of flowing; a substance which is incapable 
of resisting forces (tangential stresses) tending 
to change its shape without altering its size. A 
fluid has absolutely no tendency to spring back to its ori- 
ginal shape when distorted, except in virtue of a surface 
tension. A perfect fluid is a fluid in which a bending stress 
produces an instantaneous strain that is to say, there is 
no delay in taking a form of equilibrium, except what is 
due to the masses of the particles : opposed to a viscous 
fluid, in which the yielding is not instantaneous, and to a 
plastic solid, which yields instantaneously to a sufficient, 
but not to a very small, stress. Fluids are divided into 
liquids and gases or vapors. Oases or elastic fluids tend to 
