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Definition of hydra
Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of hydra is as below...
Hydra (n.) Any small
fresh-water
hydroid
of the genus
Hydra,
usually
found
attached
to
sticks,
stones,
etc., by a basal
sucker..
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Hydrazine
::
Hydrazine
(n.) Any one of a
series
of
nitrogenous
bases,
resembling
the
amines
and
produced
by the
reduction
of
certain
nitroso
and diazo
compounds;
as,
methyl
hydrazine,
phenyl
hydrazine,
etc. They are
derivatives
of
hydrazine
proper,
H2N.NH2,
which is a
doubled
amido
group,
recently
(1887)
isolated
as a
stable,
colorless
gas, with a
peculiar,
irritating
odor. As a base it forms
distinct
salts.
Called
also
diamide,
amidogen,
(or more
properly
diamidogen),
etc..
Dashpot
::
Dashpot
(n.) A
pneumatic
or
hydraulic
cushion
for a
falling
weight,
as in the valve gear of a steam
engine,
to
prevent
shock..
Tubularia
::
Tubularia
(n.) A genus of
hydroids
having
large,
naked,
flowerlike
hydranths
at the
summits
of long,
slender,
usually
simple,
stems.
The
gonophores
are
small,
and form
clusters
at the bases of the outer
tentacles..
Lime
::
Lime (v. t.) To treat with lime, or oxide or
hydrate
of
calcium;
to
manure
with lime; as, to lime hides for
removing
the hair; to lime sails in order to
whiten
them..
Theca
::
Theca (n.) The
chitinous
cup which
protects
the
hydranths
of
certain
hydroids.
Hydramide
::
Hydramide
(n.) One of a group of
crystalline
bodies
produced
by the
action
of
ammonia
on
certain
aldehydes.
Gismondite
::
Gismondite
(n.) A
native
hydrated
silicate
of
alumina,
lime, and
potash,
first
noticed
near
Rome..
Pump
::
Pump (n.) An
hydraulic
machine,
variously
constructed,
for
raising
or
transferring
fluids,
consisting
essentially
of a
moving
piece or
piston
working
in a
hollow
cylinder
or other
cavity,
with
valves
properly
placed
for
admitting
or
retaining
the fluid as it is drawn or
driven
through
them by the
action
of the
piston..
Terpinol
::
Terpinol
(n.) Any oil
substance
having
a
hyacinthine
odor,
obtained
by the
action
of acids on
terpin,
and
regarded
as a
related
hydrate..
Air Chamber
::
Air
chamber
() A
cavity
containing
air to act as a
spring
for
equalizing
the flow of a
liquid
in a pump or other
hydraulic
machine.
Hydramine
::
Hydramine
(n.) One of a
series
of
artificial,
organic
bases,
usually
produced
as thick
viscous
liquids
by the
action
of
ammonia
on
ethylene
oxide.
They have the
properties
both of
alcohol
and
amines..
Geyserite
::
Geyserite
(n.) A loose
hydrated
form of
silica,
a
variety
of opal,
deposited
in
concretionary
cauliflowerlike
masses,
around
some hot
springs
and
geysers..
Zoochlorella
::
Zoochlorella
(n.) One of the small green
granulelike
bodies
found in the
interior
of
certain
stentors,
hydras,
and other
invertebrates..
Lake
::
Lake (n.) A
pigment
formed
by
combining
some
coloring
matter,
usually
by
precipitation,
with a
metallic
oxide or
earth,
esp. with
aluminium
hydrate;
as,
madder
lake;
Florentine
lake;
yellow
lake, etc..
Carbohydrate
::
Carbohydrate
(n.) One of a group of
compounds
including
the
sugars,
starches,
and gums, which
contain
six (or some
multiple
of six)
carbon
atoms,
united
with a
variable
number
of
hydrogen
and
oxygen
atoms,
but with the two
latter
always
in
proportion
as to form
water;
as
dextrose,
C6H12O6..
Hydra
::
Hydra (n.) Any small
fresh-water
hydroid
of the genus
Hydra,
usually
found
attached
to
sticks,
stones,
etc., by a basal
sucker..
#NAME?
::
-ose () A
suffix
indicating
that the
substance
to the name of which it is
affixed
is a
member
of the
carbohydrate
group;
as in
cellulose,
sucrose,
dextrose,
etc..
Mannitan
::
Mannitan
(n.) A white
amorphous
or
crystalline
substance
obtained
by the
partial
dehydration
of
mannite.
High-pressure
::
High-pressure
(a.)
Having
or
involving
a
pressure
greatly
exceeding
that of the
atmosphere;
-- said of
steam,
air,
water,
etc., and of
steam,
air, or
hydraulic
engines,
water
wheels,
etc..
Hydroxide
::
Hydroxide
(n.) A
hydrate;
a
substance
containing
hydrogen
and
oxygen,
made by
combining
water with an
oxide,
and
yielding
water by
elimination.
The
hydroxides
are
regarded
as
compounds
of
hydroxyl,
united
usually
with basic
element
or
radical;
as,
calcium
hydroxide
ethyl
hydroxide..
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