On-line Dictionary
Screw
Screw
n.
A
cylinder
, or a
cylindrical
perforation
,
having
a
continuous
rib
,
called
the
thread
,
winding
round
it
spirally
at a
constant
inclination
, so as to
leave
a
continuous
spiral
groove
between
one
turn
and
the
next
,
used
chiefly
for
producing
,
when
revolved
,
motion
or
pressure
in
the
direction
of
its
axis
, by
the
sliding
of
the
threads
of
the
cylinder
in
the
grooves
between
the
threads
of
the
perforation
adapted
to it,
the
former
being
distinguished
as
the
external
, or
male
screw
, or,
more
usually
the
screw
;
the
latter
as
the
internal
, or
female
screw
, or,
more
usually
,
the
nut
.
Screw
n.
Specifically
, a
kind
of
nail
with
a
spiral
thread
and
a
head
with
a
nick
to
receive
the
end
of
the
screw
-
driver
.
Screws
are
much
used
to
hold
together
pieces
of
wood
or to
fasten
something
;
called
also
wood
screws
,
and
screw
nails
.
See
also
Screw
bolt
,
below
.
Screw
n.
Anything
shaped
or
acting
like
a
screw
;
esp
., a
form
of
wheel
for
propelling
steam
vessels
. It is
placed
at
the
stern
,
and
furnished
with
blades
having
helicoidal
surfaces
to
act
against
the
water
in
the
manner
of a
screw
.
See
Screw
propeller
,
below
.
Screw
n.
A
steam
vesel
propelled
by a
screw
instead
of
wheels
; a
screw
steamer
; a
propeller
.
Screw
n.
An
extortioner
; a
sharp
bargainer
; a
skinflint
; a
niggard
.
Screw
n.
An
instructor
who
examines
with
great
or
unnecessary
severity
;
also
, a
searching
or
strict
examination
of a
student
by an
instructor
.
Screw
n.
A
small
packet
of
tobacco
.
Screw
n.
An
unsound
or
worn
-
out
horse
,
useful
as a
hack
,
and
commonly
of
good
appearance
.
Screw
n.
A
straight
line
in
space
with
which
a
definite
linear
magnitude
termed
the
pitch
is
associated
(cf.
5th
Pitch
, 10 (b)). It is
used
to
express
the
displacement
of a
rigid
body
,
which
may
always
be
made
to
consist
of a
rotation
about
an
axis
combined
with
a
translation
parallel
to
that
axis
.
Screw
n.
An
amphipod
crustacean
; as,
the
skeleton
screw
(
Caprella
).
See
Sand
screw
,
under
Sand
.
Screw
v. t.
To
turn
, as a
screw
; to
apply
a
screw
to; to
press
,
fasten
, or
make
firm
, by
means
of a
screw
or
screws
; as, to
screw
a
lock
on a
door
; to
screw
a
press
.
Screw
v. t.
To
force
; to
squeeze
; to
press
, as by
screws
.
Screw
v. t.
Hence
: To
practice
extortion
upon
; to
oppress
by
unreasonable
or
extortionate
exactions
.
Screw
v. t.
To
twist
; to
distort
; as, to
screw
his
visage
.
Screw
v. t.
To
examine
rigidly
, as a
student
; to
subject
to a
severe
examination
.
Screw
v. i.
To
use
violent
mans
in
making
exactions
; to be
oppressive
or
exacting
.
Screw
v. i.
To
turn
one
's
self
uneasily
with
a
twisting
motion
; as, he
screws
about
in
his
chair
.
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