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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.) A
characteristic,
essential,
and
fundamental
constituent
of any
compound;
hence,
sometimes,
an
atom..
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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atom has been
replaced
by the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..
Valeryl
::
Valeryl
(n.) The
hypothetical
radical
C5H9O,
regarded
as the
essential
nucleus
of
certain
valeric
acid
derivatives..
Naphthyl
::
Naphthyl
(n.) A
hydrocarbon
radical
regarded
as the
essential
residue
of
naphthalene.
Octad
::
Octad (n.) An atom or
radical
which has a
valence
of
eight,
or is
octavalent..
Quinoxyl
::
Quinoxyl
(n.) The
hypothetical
radical
of
certain
quinone
derivatives
related
to
rhodizonic
acid.
Sulphionide
::
Sulphion
(n.) A
hypothetical
radical,
SO4,
regarded
as
forming
the acid or
negative
constituent
of
sulphuric
acid and the
sulphates
in
electrolytic
decomposition;
-- so
called
in
accordance
with the
binary
theory
of
salts..
Acetyl
::
Acetyl
(n.) A
complex,
hypothetical
radical,
composed
of two parts of
carbon
to three of
hydrogen
and one of
oxygen.
Its
hydroxide
is
acetic
acid..
Tolylene
::
Tolylene
(n.) A
hydrocarbon
radical,
C6H4.(CH2)2,
regarded
as
characteristic
of
certain
toluene
derivatives..
Oxalyl
::
Oxalyl
(n.) A
hydrocarbon
radical
(C2O2)
regarded
as a
residue
of
oxalic
acid and
occurring
in
derivatives
of it.
Octyl
::
Octyl (n.) A
hypothetical
hydrocarbon
radical
regarded
as an
essential
residue
of
octane,
and as
entering
into its
derivatives;
as, octyl
alcohol..
Radical
::
Radical
(a.)
Hence:
Of or
pertaining
to the root or
origin;
reaching
to the
center,
to the
foundation,
to the
ultimate
sources,
to the
principles,
or the like;
original;
fundamental;
thorough-going;
unsparing;
extreme;
as,
radical
evils;
radical
reform;
a
radical
party..
Degree
::
Degree
(n.) State as
indicated
by sum of
exponents;
more
particularly,
the
degree
of a term is
indicated
by the sum of the
exponents
of its
literal
factors;
thus, a2b3c is a term of the sixth
degree.
The
degree
of a
power,
or
radical,
is
denoted
by its
index,
that of an
equation
by the
greatest
sum of the
exponents
of the
unknown
quantities
in any term; thus, ax4 + bx2 = c, and mx2y2 + nyx = p, are both
equations
of the
fourth
degree..
Steatite
::
Stearyl
(n.) The
hypothetical
radical
characteristic
of
stearic
acid.
Thionyl
::
Thionyl
(n.) The
hypothetical
radical
SO,
regarded
as an
essential
constituent
of
certain
sulphurous
compounds;
as,
thionyl
chloride..
Artiad
::
Artiad
(a.) Even; not odd; -- said of
elementary
substances
and of
radicals
the
valence
of which is
divisible
by two
without
a
remainder.
Valence
::
Valence
(n.) The
degree
of
combining
power of an atom (or
radical)
as shown by the
number
of atoms of
hydrogen
(or of other
monads,
as
chlorine,
sodium,
etc.) with which it will
combine,
or for which it can be
substituted,
or with which it can be
compared;
thus, an atom of
hydrogen
is a
monad,
and has a
valence
of one; the atoms of
oxygen,
nitrogen,
and
carbon
are
respectively
dyads,
triads,
and
tetrads,
and have a
valence
respectively
of two,
three,
and
four..
Sans-culotte
::
Sans-culotte
(n.)
Hence,
an
extreme
or
radical
republican;
a
violent
revolutionist;
a
Jacobin..
Hexdecyl
::
Hexdecyl
(n.) The
essential
radical,
C16H33,
of
hecdecane..
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..
Hexatomic
::
Hexatomic
(a.)
Having
six
replaceable
radicals.
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