You are John Rugby, and you are Jack Rugby. --Shak.
2. An impertinent or silly fellow; a simpleton; a boor; a
clown; also, a servant; a rustic. ``Jack fool.''
--Chaucer.
Since every Jack became a gentleman, There 's many a
gentle person made a Jack. --Shak.
3. A popular colloquial name for a sailor; -- called also
{Jack tar}, and {Jack afloat}.
4. A mechanical contrivance, an auxiliary machine, or a
subordinate part of a machine, rendering convenient
service, and often supplying the place of a boy or
attendant who was commonly called Jack; as:
(a) A device to pull off boots.
(b) A sawhorse or sawbuck.
(c) A machine or contrivance for turning a spit; a smoke
jack, or kitchen jack.
(b) (Mining) A wooden wedge for separating rocks rent by
blasting.
(e) (Knitting Machine) A lever for depressing the sinkers
which push the loops down on the needles.
(f) (Warping Machine) A grating to separate and guide the
threads; a heck box.
(g) (Spinning) A machine for twisting the sliver as it
leaves the carding machine.
(h) A compact, portable machine for planing metal.
(i) A machine for slicking or pebbling leather.
(k) A system of gearing driven by a horse power, for
multiplying speed.
(l) A hood or other device placed over a chimney or vent
pipe, to prevent a back draught.
(m) In the harpsichord, an intermediate piece
communicating the action of the key to the quill; --
called also {hopper}.
(n) In hunting, the pan or frame holding the fuel of the
torch used to attract game at night; also, the light
itself. --C. Hallock.
5. A portable machine variously constructed, for exerting
great pressure, or lifting or moving a heavy body through
a small distance. It consists of a lever, screw, rack and
pinion, hydraulic press, or any simple combination of
mechanical powers, working in a compact pedestal or
support and operated by a lever, crank, capstan bar, etc.
The name is often given to a jackscrew, which is a kind of
jack.
6. The small bowl used as a mark in the game of bowls.
--Shak.
Like an uninstructed bowler who thinks to attain the
jack by delivering his bowl straight forward upon
it. --Sir W.
Scott.
7. The male of certain animals, as of the ass.
8. (Zo["o]l.)
(a) A young pike; a pickerel.
(b) The jurel.
(c) A large, California rock fish ({Sebastodes
paucispinus}); -- called also {boccaccio}, and
{m['e]rou}.
(d) The wall-eyed pike.
9. A drinking measure holding half a pint; also, one holding
a quarter of a pint. [Prov. Eng.] --Halliwell.
10. (Naut.)
(a) A flag, containing only the union, without the fly,
usually hoisted on a jack staff at the bowsprit cap;
-- called also {union jack}. The American jack is a
small blue flag, with a star for each State.
(b) A bar of iron athwart ships at a topgallant masthead,
to support a royal mast, and give spread to the royal
shrouds; -- called also {jack crosstree}. --R. H.
Dana, Jr.
Note: The meadow or green grasshoppers belong to the
{Locustid[ae]}. They have long antenn[ae], large
ovipositors, and stridulating organs at the base of the
wings in the male. The European great green grasshopper
({Locusta viridissima}) belongs to this family. The
common American green species mostly belong to
{Xiphidium}, {Orchelimum}, and {Conocephalus}.
2. In ordinary square or upright pianos of London make, the
escapement lever or jack, so made that it can be taken out
and replaced with the key; -- called also the {hopper.}
--Grove.
{Grasshopper engine}, a steam engine having a working beam
with its fulcrum at one end, the steam cylinder at the
other end, and the connecting rod at an intermediate
point.
{Grasshopper lobster} (Zo["o]l.) a young lobster. [Local, U.
S.]
{Grasshopper warbler} (Zo["o]l.), cricket bird.
2. A chute, box, or receptacle, usually funnel-shaped with an
opening at the lower part, for delivering or feeding any
material, as to a machine; as, the wooden box with its
trough through which grain passes into a mill by joining
or shaking, or a funnel through which fuel passes into a
furnace, or coal, etc., into a car.
3. (Mus.) See {Grasshopper}, 2.
4. pl. A game. See {Hopscotch}. --Johnson.
5. (Zo["o]l.)
(a) See {Grasshopper}, and {Frog hopper}, {Grape hopper},
{Leaf hopper}, {Tree hopper}, under {Frog}, {Grape},
{Leaf}, and {Tree}.
(b) The larva of a cheese fly.
6. (Naut.) A vessel for carrying waste, garbage, etc., out to
sea, so constructed as to discharge its load by a
mechanical contrivance; -- called also {dumping scow}.
{Bell and hopper} (Metal.), the apparatus at the top of a
blast furnace, through which the charge is introduced,
while the gases are retained.
{Hopper boy}, a rake in a mill, moving in a circle to spread
meal for drying, and to draw it over an opening in the
floor, through which it falls.
{Hopper closet}, a water-closet, without a movable pan, in
which the receptacle is a funnel standing on a draintrap.
{Hopper cock}, a faucet or valve for flushing the hopper of a
water-closet.