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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.) A
serpent
or
monster
in the lake or marsh of
Lerna,
in the
Peloponnesus,
represented
as
having
many
heads,
one of
which,
when cut off, was
immediately
succeeded
by two
others,
unless
the wound was
cauterized.
It was slain by
Hercules.
Hence,
a
terrible
monster..
Lern More About Hydra
☛ Wiki Definition of Hydra
☛ Wiki Article of Hydra
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Hydroxyl
::
Hydroxyl
(n.) A
compound
radical,
or
unsaturated
group,
HO,
consisting
of one atom of
hydrogen
and one of
oxygen.
It is a
characteristic
part of the
hydrates,
the
alcohols,
the
oxygen
acids,
etc..
Humin
::
Humin (n.) A
bitter,
brownish
yellow,
amorphous
substance,
extracted
from
vegetable
mold, and also
produced
by the
action
of acids on
certain
sugars
and
carbohydrates;
--
called
also humic acid,
ulmin,
gein, ulmic or geic acid, etc..
Tropidine
::
Tropidine
(n.) An
alkaloid,
C8H13N,
obtained
by the
chemical
dehydration
of
tropine,
as an oily
liquid
having
a
coninelike
odor..
Hydranth
::
Hydranth
(n.) One of the
nutritive
zooids
of a
hydroid
colony.
Also
applied
to the
proboscis
or
manubrium
of a
hydroid
medusa.
See
Illust.
of
Hydroidea.
Water Lime
::
Water lime ()
Hydraulic
lime.
Brucite
::
Brucite
(n.) A
white,
pearly
mineral,
occurring
thin and
foliated,
like talc, and also
fibrous;
a
native
magnesium
hydrate..
Hydr-
::
Hydr- () A
combining
form from Gr. /, /, water (see
Hydra)..
Methylate
::
Methylate
(n.) An
alcoholate
of
methyl
alcohol
in which the
hydroxyl
hydrogen
is
replaced
by a
metal,
after the
analogy
of a
hydrate;
as,
sodium
methylate,
CH3ONa..
Cryohydrate
::
Cryohydrate
(n.) A
substance,
as salt,
ammonium
chloride,
etc., which
crystallizes
with water of
crystallization
only at low
temperatures,
or below the
freezing
point of
water..
Hydrastine
::
Hydrastine
(n.) An
alkaloid,
found in the
rootstock
of the
golden
seal
(Hydrastis
Canadensis),
and
extracted
as a
bitter,
white,
crystalline
substance.
It is used as a tonic and
febrifuge..
Mannitan
::
Mannitan
(n.) A white
amorphous
or
crystalline
substance
obtained
by the
partial
dehydration
of
mannite.
Hydraulic
::
Hydraulic
(a.) Of or
pertaining
to
hydraulics,
or to
fluids
in
motion;
conveying,
or
acting
by,
water;
as, an
hydraulic
clock,
crane,
or
dock..
Pectin
::
Pectin
(n.) One of a
series
of
carbohydrates,
commonly
called
vegetable
jelly,
found very
widely
distributed
in the
vegetable
kingdom,
especially
in ripe
fleshy
fruits,
as
apples,
cranberries,
etc. It is
extracted
as
variously
colored,
translucent
substances,
which are
soluble
in hot water but
become
viscous
on
cooling..
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..
Hydrargyrate
::
Hydrargyrate
(a.) Of or
pertaining
to
mercury;
containing,
or
impregnated
with,
mercury..
Water Cement
::
Water
cement
()
Hydraulic
cement.
Thiophenol
::
Thiophenol
(n.) A
colorless
mobile
liquid,
C6H5.SH,
of an
offensive
odor, and
analogous
to
phenol;
--
called
also
phenyl
sulphydrate..
Standpipe
::
Standpipe
(n.) A
vertical
pipe, open at the top,
between
a
hydrant
and a
reservoir,
to
equalize
the flow of
water;
also, a large
vertical
pipe, near a
pumping
engine,
into which water is
forced
up, so as to give it
sufficient
head to rise to the
required
level at a
distance..
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..
Hydroid
::
Hydroid
(a.)
Related
to, or
resembling,
the
hydra;
of or
pertaining
to the
Hydroidea..
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