screw-fish 
screw-fish (skro'fish), . Fish packed under a 
screw-press. [Trade-name.] 
screw-forceps (skr6'f6r*seps), it. A dentists' 
instrument with jaws between which is a screw, 
which is caused to protrude into and fill the 
nerve-canal, to obviate risk of crushing the 
tooth when the jaws of the instrument are 
closed upon it. E. H. Knight. 
screw-gage (skro'gaj), n. A device for testing 
the diameter, the pitch, and the accuracy of 
the thread of screws. It consists of a steel ring cut 
with an internal screw of the standard gage. Also called 
screw-thread gage. Internal screw-gage, a steel screw 
with an external thread cut to an accurate gage, used to 
test internal-threaded or female screws. 
Screw-gear (skro'ger), . In mech., a worm- 
screw and worm-wheel, or endless screw and 
pinion. E. H. Knight. 
screw-hoist (skro'tioist), M. A hoisting-appa- 
ratus consisting of a large toothed wheel, with 
which is geared an endless screw. 
screwing (skro'ing), . Exacting; close; care- 
ful; economical. 
Whose screwing iron-handed administration of relief is 
the boast of the parish. Howitt. (fmp. Diet.) 
SCrewing-engine (skro'ing-en'jiu), . A ma- 
chine for cutting wooden screws and for the 
making of screwed-work. 
screwing-machine (skro'ing-ma-shen*), . 
Same as screw-machine. 
SCrewing-Stock (skr8'ing-stok), . Same as 
screw-stock Guide screwing-stock, a common form 
of die-stock for cutting threads on pipe or rods. It has a 
guide in the form of a bushing with screws, to clamp the 
exterior of the pipe or rod and cause the die to turn in 
a plane at right angles to the longitudinal axis of the ob- 
ject upon which the screw-thread is to be cut. 
sere Wing-table (skro'ing-ta"^!), . Same as 
screw-table. 
screw-jack (skro'jak), . In dentistry, an im- 
plement, consisting of two abutments with 
screws between them, for regulating displaced 
or crowded teeth.-Traversing screw-jack. See 
traversing-jack. 
screw-key (skro'ke), n. A key for turning a 
screw. It may be a form of screw-driver, or a 
form of wrench. See cut under screw-stock. 
screw-lock (skro'lok), n. A type of lock hav- 
ing a movable opening bar, which is secured 
by a screw when the lock is closed. It is made 
in various forms, and is used for handcuffs, 
fetters, padlocks, etc. 
screw-machine (skro'ma-shen*), n. A machine 
for making screws. For'metal screws it is a form of 
lathe similar to a bolt-machine. For wooden screws it is a 
machine, or a series of machines, working more or less 
automatically, for trimming, nicking, and threading screw 
blanks, which are fed in by a hopper, and are turned out 
as finished screws. The name is also given to screw-cut- 
ting machines (which see, under screw-cutting). 
screw-mandrel (skro'man"drel), . A man- 
drel of the head-stock of a lathe provided with 
a screw for attaching chucks. 
screw-medal (skro'med"al), H. Same as screw- 
dollar. 
screw-molding (skro/mol'ding), n. 1. The 
molding of screws in sand for casting. A 
cylindrical mold is made, and a pattern screw 
run through it to form the thread. 2. The 
process of forming screws of sheet-metal for 
collars or caps, by pressing upon a former. 
screw-nail (skro'nal), . A screw used to fas- 
ten pieces of wood together. 
screw-neck (skro'nek), n. A neck of a bot- 
tle, flask, etc., provided with a male screw for 
the reception of a screw-cap. 
screw-pile (skro'pll), n. A pile with a screw 
at the lower end, sunk by rotation aided by 
pressure if necessary. See sheets-pile. Also 
called boring-anchor. 
screw-pillar (skro'piFar), n. The tool-post of 
an engine-lathe. 
screw-pin (skro'pin), . A screw which has an 
extension in the form of a pin, the screwed 
part being used to hold the pin firmly in its 
socket. 
screw-pine (skro'pin), . A plant of the genus 
Pandanus, or more broadly of the order Pan- 
danese : so called from the spiral arrangement 
of the leaves and their resemblance to those of 
the pineapple. The best-known species is P. odora- 
tissimus, found from the East Indies to the Pacific islands. 
Its richly scented male flowers are the source of the keora- 
oil of perfumers. In India it is sometimes planted for 
hedges, and to fix the banks of canals. Its leaves and 
those of other species are made into matting and sacking. 
It has a large compound fruit of a bright-orange color, 
which is edible, though insipid, and bears the name of 
breadfruit. See chandelier-tree, and cut under Pandanus. 
screw : plate (skro'plat), . 1. A holder for 
the dies used in cutting screw-threads. 2. A 
small steel plate containing dies by which 
5422 
screws of various sizes may be formed. See 
cut under screw-stock. 3. A tool for cutting 
external screw-threads upon wire, small rods, 
or pipes. See die-stock, and cut under ttcrete- 
stock. 
screw-pod, screw-pod mesquit (skro'pod, 
skro'pod mes'kit), n. The screw-bean, Froso- 
pis pubescens. See mesquit. 
screw-post (skro'post), n. Naut.. the inner 
stern-post through which the shaft of a screw 
propeller passes. 
screw-press (skro'pres), . A simple form of 
press producing pressure by the direct action 
of a screw : used by printers and bookbinders 
for dry-pressing, or removing the indentations 
of impression from printed sheets, and for mak- 
ing bound books more compact and solid. 
screw-propeller, n. See screw propeller, under 
screw Screw-propeller governor. See governor. 
screw-punch (skro'punch), H. A punch in 
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". bed ; t>, yoke, on the inner sides of which are slides for the cross- 
head c ; rf, the punch proper ; e, nut for the screw ; _A weighted lever 
by which the screw is mane to exert its power upon the punch ti. 
which the operating pressure is applied by a 
screw. 
screw-Quoin (skro'koin), n. In prin ting, a quoin 
of two or more parts which widens and tightens 
composed types by means of a screw which con- 
nects these parts. Many forms are in use. 
screw-rod (skro'rod), n. A rod with a screw 
and nut at one or both ends, used principally 
as a binding- or tightening-rod. 
screw-rudder (skro'rud' r er), n. An applica- 
tion of the screw to purposes of steering, tak- 
ing the place of a rudder. The direction of its axis 
is changed, by means of a joint in the shaft, to give the 
required direction to the vessel, and the efficiency of this 
device does not depend upon the motion of the vessel, as 
with a rudder. E. H. Knight. 
screw-shackle (skro'sbak*!), . A shackle of 
which the shackle-bolt is screwed into place. 
screw-shell (skro'shel), . A gastropod of the 
family Turritellidse. P. P. Carpenter. 
screw-spike (skro'spik), n. A cylindrical spike 
having a screw-thread cut on a part of its stem. 
It is driven partly in, and then screwed home. 
E. H. Knight. 
Screw-Stair (skro'star), n. A spiral or winding 
staircase ; a hanging-stair. 
He was a bachelor, and lived in a very small house, 
above his shop, which was reached by a screw-stair. 
N. McLeod, The Starling, xxv. 
screw-stem (skro ' stem), n. A plant of the 
genus Bartonia of the gentian family. These 
plants are low, delicate herbs, sometimes with 
a twisted stem. Wood. 
screw-stock (skro'stok), n. A handle for hold- 
ing the threaded 
die by which the 
thread is cut on 
a bar or bolt; a 
screw-plate. E. 
~~_ 0. 
a 
scribacious 
ing interior screw-threads of any form. It is 
the reverse of the external screw-cutter, or 
screw-plate. Compare plug-tap and taper-tap. 
screw-thread (skro'thred), n. 1. The spiral 
ridge formed on the cylinder of a male screw, 
or on the inner surface of a 
female screw or nut. A screw- 
thread has the same slope through- 
out relatively to a plane at right 
angles to the longitudinal axis of 
the screw, and all points on it are 
equidistant from that axis. 
2. A single turn of the spi- 
ral ridge of a male or female 
screw: used by mechanics 
to designate the number of 
such turns in a unit of length 
of the axis of the screw. 
Commonly called simply 
thread.- Screw-thread gage. 
Same as screw-gage. 
screw-tool (skro ' tol), . 
Any tool, as a tap, a die, 
a chaser, or a machine, for 
cutting screws. 
screw-tree (skro'tre), . 
See Hclicteres. 
screw-valve (skro'valv), n. 
1. A stop-cock furnished 
with a puppet-valve opened 
and shut by a screw instead 
Of by a Spigot. 2. A Screw low thread; d, truncated 
With a COnical point form- thread ;<, angularthread, 
. iii .eii j i rounded top and bottom ; 
ing a small valve, fitted to /, thread 
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Screw-threads. 
thread, sometimes used 
in joinery ; h, thread bev- 
eled more on the inner 
side than the outer, by 
which a firmer hold 
against withdrawal is se- 
gular thread, much used 
in large screws; /, same 
as , with truncated an- 
gles ; m, rounded thread : 
0, P. ?. *". special types of 
thread. 
H. Knight. 
screwstone 
(skro'ston), n. A 
wheelstone ; an 
entrochite ; one 
of the joints of 
the stem of an 
encrinite, stone- 
lily, or fossil cri- 
noid ; a fossil 
screw. See cuts 
under Encriiiidee 
and encrinite. 
screw-table 
(skro'ta"bl),. A 
form of screw- 
stock used for 
forming the 
threads of screw- 
bolts or wooden 
screws. E. H. 
Knight. 
Screw-stocks, Screw-taps, and Dies. 
a, screw-stock in which the dies c are 
forced by the screw s inward against the 
rod r upon which the screw-thread is to lie 
cut: the dies are a Iso shown in enlarged de- 
tail at c and ct. e, anotherfonn of die-stock 
in which three dies are used, two of them 
being forced toward a third by a screw-key 
/ i .. / p, moved by a nut o . b, a screw-plate, 
SereW-tap ( Skro - comprising variously sized dies for cutting 
tar^ A tnnl small screws; /"and s, chasers for cut- 
tap;, M, A t( il t[ screws in lalh( .^ hei for male 
tor Cutting screws and f for female screws ; i, taps 
Qnrp-nr rVivoa^a rn for cutting threads of female screws an-i 
screw-tnieads on nuts a cross scclioll t^,,,, showll at Ai and 
the inside Of ( he form of tap prior to cutting out the 
! longitudinal channels or clearances being 
pipes, or mak- shown at*. 
a conical seat and used for 
regulating flow. 
screw-ventilator (skro '- 
ven'ti-la-tor), n. A ven- 
tilating apparatus, consist- 
ing of a screw-wheel set in 
a frame or a window-pane, 
etc., which is caused to ro- 
tate by the passage of a 
current of heated air. it ex- 
erts no mechanical force to pro- 
mote the discharge of vitiated air, but it can be made to 
rotate in only one direction, so that it will not yield to a 
cold current impinging upon it from the outside, and will 
thus oppose its entrance. 
screw-well (skro'wel), . A hollow in the stern 
of some ships into which the propeller can be 
lifted after being detached from the shaft, 
when the ship is to run under canvas only. 
screw-wheel (skro'hwel), n. A wheel which 
gears with an endless screw. 
screw-Wire (skro'wir), . In shoe-manttf., a 
cable-twisted wire used for fastening soles to 
uppers. It is applied by means of a machine which, with 
great rapidity of action, fits the parts together, forces the 
pieces of wire into place, and cuts them from the coil at 
the proper lengths. 
screw-worm (skro'werm), n. The larva of a 
blow-fly, Lucilia macellaria, which deposits its 
eggs or larva? on sores on living animals. The 
larvse, usually in great numbers, develop rapidly and 
cause serious, often fatal, results. Horses, cattle, sheep, 
and swine are attacked, and there are cases on record in 
which human beings have suffered severely, death result- 
ing in some instances. The best remedy is a free use of 
pyrethrum powder, followed by carbolic acid. [South- 
western U. 8.] 
screw-wrench (skro'rench), n. 1. Any form 
of wrench, as one with fixed jaws or one in 
the form of a spanner, adapted for turning 
square- or polygonal-headed screws or bolts. 
2. A wrench of which the jaws are opened or 
drawn together by means of a screw. 
screwy 1 (skro'i), a. [< screw 1 + -y 1 .] Tortu- 
ous, like the thread or motion of a screw : as, a 
screwy motion. 
screwy 12 (skro'i), a. [< screw' 2 + -y 1 .'] 1. Ex- 
acting; close; stingy; mean; oppressive. [Col- 
loq.] 
Mechanics are capital customers for scientific or trade 
books, such as suit their business. . . . But they're not so 
screwy. Mayhew, London Labour and London Poor, I. 319. 
2. Worn out; worthless. [Colloq.] 
The oldest and screwiest horse in the stables. 
R. Broughton, Red as a Rose, xix. 
scribt, . [Appar. a var. of scrub 1 .'] A scrub; a 
miser. 
Promus magis quant condus : he is none of these miser- 
able scribs, but a liberal! gentleman. 
Witluils, Wet. (ed. 1634), p. 575. (Ufares.) 
scribablet (skri'ba-bl), a. [< ME. scribabil ; < 
scribe + -able.~\ Capable of being written, or 
of being written upon. 
Paper scribabil the bale, vi. d'. Paper spendable the 
reme, q'. Arnold's Chron., p. 74. 
scribacious (skri-ba'shus), a. [< L. as if "scribax 
(ftcribi(c-), given to writing (< seribere, write: 
