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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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Hydrosalt
::
Hydrosalt
(n.) A
hydrous
salt; a salt
combined
with water of
hydration
or
crystallization.
Terpin
::
Terpin
(n.) A white
crystalline
substance
regarded
as a
hydrate
of oil of
turpentine.
Dehydrate
::
Dehydrate
(v. t.) To
deprive
of
water;
to
render
free from
water;
as, to
dehydrate
alcohol..
Hydra
::
Hydra (n.)
Hence:
A
multifarious
evil, or an evil
having
many
sources;
not to be
overcome
by a
single
effort..
Hydra
::
Hydra (n.) A
southern
constellation
of great
length
lying
southerly
from
Cancer,
Leo, and
Virgo..
Hydramide
::
Hydramide
(n.) One of a group of
crystalline
bodies
produced
by the
action
of
ammonia
on
certain
aldehydes.
Saccharate
::
Saccharate
(n.) In a wider
sense,
a
compound
of
saccharose,
or any
similar
carbohydrate,
with such bases as the
oxides
of
calcium,
barium,
or lead; a
sucrate..
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..
Hydrina
::
Hydrina
(n. pl.) The group of
hydroids
to which the
fresh-water
hydras
belong.
Pyrosulphuric
::
Pyrosulphuric
(a.)
Pertaining
to, or
designating,
an acid
called
also
disulphuric
acid)
obtained
by
distillation
of
certain
sulphates,
as a
colorless,
thick,
oily
liquid,
H2S2O7
resembling
sulphuric
acid. It is used in the
solution
of
indigo,
in the
manufacture
of
alizarin,
and in
dehydration..
Gummite
::
Gummite
(n.) A
yellow
amorphous
mineral,
essentially
a
hydrated
oxide of
uranium
derived
from the
alteration
of
uraninite..
Glycide
::
Glycide
(n.) A
colorless
liquid,
obtained
from
certain
derivatives
of
glycerin,
and
regarded
as a
partially
dehydrated
glycerin;
--
called
also
glycidic
alcohol..
Saxifragaceous
::
Saxifragaceous
(a.) Of or
pertaining
to a
natural
order of
plants
(Saxifragaceae)
of which
saxifrage
is the type. The order
includes
also the alum root, the
hydrangeas,
the mock
orange,
currants
and
gooseberries,
and many other
plants..
Verditer
::
Verditer
(n.)
Either
one of two
pigments
(called
blue
verditer,
and green
verditer)
which are made by
treating
copper
nitrate
with
calcium
carbonate
(in the form of lime,
whiting,
chalk,
etc.) They
consist
of
hydrated
copper
carbonates
analogous
to the
minerals
azurite
and
malachite..
Hydrosulphide
::
Hydrosulphide
(n.) One of a
series
of
compounds,
derived
from
hydrogen
sulphide
by the
replacement
of half its
hydrogen
by a base or basic
radical;
as,
potassium
hydrosulphide,
KSH. The
hydrosulphides
are
analogous
to the
hydrates
and
include
the
mercaptans..
Cellulose
::
Cellulose
(n.) The
substance
which
constitutes
the
essential
part of the solid
framework
of
plants,
of
ordinary
wood,
linen,
paper,
etc. It is also found to a
slight
extent
in
certain
animals,
as the
tunicates.
It is a
carbohydrate,
(C6H10O5)n,
isomeric
with
starch,
and is
convertible
into
starches
and
sugars
by the
action
of heat and
acids.
When pure, it is a white
amorphous
mass. See
Starch,
Granulose,
Lignin..
Hydraemia
::
Hydraemia
(n.) An
abnormally
watery
state of the
blood;
anaemia.
Thionol
::
Thionol
(n.) A red or
violet
dyestuff
having
a
greenish
metallic
luster.
It is
produced
artificially,
by the
chemical
dehydration
of
thionine,
as a brown
amorphous
powder..
Hydrarthrosis
::
Hydrarthrosis
(n.) An
effusion
of
watery
liquid
into the
cavity
of a
joint.
Theca
::
Theca (n.) The
chitinous
cup which
protects
the
hydranths
of
certain
hydroids.
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