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Definition of radical
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 radical is as below...
Radical
(n.)
Specifically,
a group of two or more
atoms,
not
completely
saturated,
which are so
linked
that their union
implies
certain
properties,
and are
conveniently
regarded
as
playing
the part of a
single
atom; a
residue;
--
called
also a
compound
radical.
Cf.
Residue..
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Radix
::
Radix (n.) A
primitive
word, from which
spring
other
words;
a
radical;
a root; an
etymon..
Zircofluoride
::
Zircofluoride
(n.) A
double
fluoride
of
zirconium
and
hydrogen,
or some other
positive
element
or
radical;
as,
zircofluoride
of
sodium..
Nitro-
::
Nitro-
() A
combining
form (used also
adjectively)
designating
certain
compounds
of
nitrogen
or of its
acids,
as
nitrohydrochloric,
nitrocalcite;
also,
designating
the group or
radical
NO2, or its
compounds,
as
nitrobenzene..
Xenyl
::
Xenyl (n.) The
radical
characteristic
of
xenylic
compounds.
Surd
::
Surd (a.)
Involving
surds;
not
capable
of being
expressed
in
rational
numbers;
radical;
irrational;
as, a surd
expression
or
quantity;
a surd
number..
Biacid
::
Biacid
(a.)
Having
two
hydrogen
atoms which can be
replaced
by
negative
atoms or
radicals
to form
salts;
-- said of
bases.
See
Diacid.
Mercaptan
::
Mercaptan
(n.) Any one of
series
of
compounds,
hydrosulphides
of
alcohol
radicals,
in
composition
resembling
the
alcohols,
but
containing
sulphur
in place of
oxygen,
and hence
called
also the
sulphur
alcohols.
In
general,
they are
colorless
liquids
having
a
strong,
repulsive,
garlic
odor. The name is
specifically
applied
to ethyl
mercaptan,
C2H5SH.
So
called
from its
avidity
for
mercury,
and other
metals..
Aniline
::
Aniline
(n.) An
organic
base
belonging
to the
phenylamines.
It may be
regarded
as
ammonia
in which one
hydrogen
atom has been
replaced
by the
radical
phenyl.
It is a
colorless,
oily
liquid,
originally
obtained
from
indigo
by
distillation,
but now
largely
manufactured
from coal tar or
nitrobenzene
as a base from which many
brilliant
dyes are
made..
Substitutional
::
Substitution
(n.) The act or
process
of
substituting
an atom or
radical
for
another
atom or
radical;
metethesis;
also, the state of being so
substituted.
See
Metathesis..
Synthesis
::
Synthesis
(n.) The art or
process
of
making
a
compound
by
putting
the
ingredients
together,
as
contrasted
with
analysis;
thus, water is made by
synthesis
from
hydrogen
and
oxygen;
hence,
specifically,
the
building
up of
complex
compounds
by
special
reactions,
whereby
their
component
radicals
are so
grouped
that the
resulting
substances
are
identical
in every
respect
with the
natural
articles
when such
occur;
thus,
artificial
alcohol,
urea,
indigo
blue,
alizarin,
etc., are made by
synthesis..
Bibasic
::
Bibasic
(a.)
Having
to
hydrogen
atoms which can be
replaced
by
positive
or basic atoms or
radicals
to form
salts;
-- said of
acids.
See
Dibasic.
Sulphophosphate
::
Sulphonium
(n.) A
hypothetical
radical,
SH3,
regarded
as the type and
nucleus
of the
sulphines..
Radical
::
Radical
(n.) One who
advocates
radical
changes
in
government
or
social
institutions,
especially
such
changes
as are
intended
to level class
inequalities;
--
opposed
to
conservative..
Ambulacrum
::
Ambulacrum
(n.) One of the
radical
zones of
echinoderms,
along which run the
principal
nerves,
blood
vessels,
and water
tubes.
These zones
usually
bear rows of
locomotive
suckers
or
tentacles,
which
protrude
from
regular
pores.
In star
fishes
they
occupy
the
grooves
along the under side of the
rays..
Whig
::
Whig (n.) One of a
political
party which grew up in
England
in the
seventeenth
century,
in the
reigns
of
Charles
I. and II., when great
contests
existed
respecting
the royal
prerogatives
and the
rights
of the
people.
Those who
supported
the king in his high
claims
were
called
Tories,
and the
advocates
of
popular
rights,
of
parliamentary
power over the
crown,
and of
toleration
to
Dissenters,
were, after 1679,
called
Whigs.
The terms
Liberal
and
Radical
have now
generally
superseded
Whig in
Englis
Octad
::
Octad (n.) An atom or
radical
which has a
valence
of
eight,
or is
octavalent..
Oenanthyl
::
Oenanthyl
(n.) A
hydrocarbon
radical
formerly
supposed
to exist in
oenanthic
acid, now known to be
identical
with
heptyl..
Pentad
::
Pentad
(n.) Any
element,
atom, or
radical,
having
a
valence
of five, or which can be
combined
with,
substituted
for, or
compared
with, five atoms of
hydrogen
or other
monad;
as,
nitrogen
is a
pentad
in the
ammonium
compounds..
Quadrivalent
::
Quadrivalent
(a.)
Having
a
valence
of four;
capable
of
combining
with, being
replaced
by, or
compared
with, four monad
atoms;
tetravalent;
-- said of
certain
atoms and
radicals;
thus,
carbon
and
silicon
are
quadrivalent
elements..
Carbide
::
Carbide
(n.) A
binary
compound
of
carbon
with some other
element
or
radical,
in which the
carbon
plays the part of a
negative;
--
formerly
termed
carburet..
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