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Definition of atom
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 atom is as below...
Atom (n.) A
constituent
particle
of
matter,
or a
molecule
supposed
to be made up of
subordinate
particles..
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Bivalent
::
Bivalent
(p. pr.)
Equivalent
in
combining
or
displacing
power to two atoms of
hydrogen;
dyad.
Tetratomic
::
Tetratomic
(a.)
Having
a
valence
of four;
quadrivalent;
tetravalent;
sometimes,
in a
specific
sense,
having
four
hydroxyl
groups,
whether
acid or
basic..
Somatome
::
Somatome
(n.) See
Somite.
-derm
::
-derm (n.) A
suffix
or
terminal
formative,
much used in
anatomical
terms,
and
signifying
skin,
integument,
covering;
as,
blastoderm,
ectoderm,
etc..
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..
Polyatomic
::
Polyatomic
(a.)
Having
a
valence
greater
than one.
Valsalvian
::
Valsalvian
(a.) Of or
pertaining
to
Valsalva,
an
Italian
anatomist
of the 17th
century..
Thorium
::
Thorium
(n.) A
metallic
element
found in
certain
rare
minerals,
as
thorite,
pyrochlore,
monazite,
etc., and
isolated
as an
infusible
gray
metallic
powder
which burns in the air and forms
thoria;
--
formerly
called
also
thorinum.
Symbol
Th.
Atomic
weight
232.0..
Atomical
::
Atomical
(a.)
Extremely
minute;
tiny.
Chromium
::
Chromium
(n.) A
comparatively
rare
element
occurring
most
abundantly
in the
mineral
chromite.
Atomic
weight
52.5.
Symbol
Cr. When
isolated
it is a hard,
brittle,
grayish
white
metal,
fusible
with
difficulty.
Its chief
commercial
importance
is for its
compounds,
as
potassium
chromate,
lead
chromate,
etc., which are
brilliantly
colored
and are used
dyeing
and
calico
printing.
Called
also
chrome..
Polymerize
::
Polymerize
(v. i.) To
change
into
another
substance
having
the same
atomic
proportions,
but a
higher
molecular
weight;
to
undergo
polymerization;
thus,
aldehyde
polymerizes
in
forming
paraldehyde..
Stoicism
::
Stoichiometry
(n.) The art or
process
of
calculating
the
atomic
proportions,
combining
weights,
and other
numerical
relations
of
chemical
elements
and their
compounds..
Monoxide
::
Monoxide
(n.) An oxide
containing
one atom of
oxygen
in each
molecule;
as,
barium
monoxide..
Simple
::
Simple
(a.) Not
capable
of being
decomposed
into
anything
more
simple
or
ultimate
by any means at
present
known;
elementary;
thus, atoms are
regarded
as
simple
bodies.
Cf.
Ultimate,
a..
Valve
::
Valve (n.) One of the two
similar
portions
of the shell of a
diatom.
Glucinum
::
Glucinum
(n.) A rare
metallic
element,
of a
silver
white
color,
and low
specific
gravity
(2.1),
resembling
magnesium.
It never
occurs
naturally
in the free
state,
but is
always
combined,
usually
with
silica
or
alumina,
or both; as in the
minerals
phenacite,
chrysoberyl,
beryl or
emerald,
euclase,
and
danalite.
It was named from its oxide
glucina,
which was known long
before
the
element
was
isolated.
Symbol
Gl.
Atomic
weight
9.1.
Called
also
beryllium..
Substitute
::
Substituent
(n.) Any atom,
group,
or
radical
substituted
for
another,
or
entering
a
molecule
in place of some other part which is
removed..
Diiodide
::
Diiodide
(n.) A
compound
of a
binary
type
containing
two atoms of
iodine;
--
called
also
biniodide.
Hexane
::
Hexane
(n.) Any one of five
hydrocarbons,
C6H14,
of the
paraffin
series.
They are
colorless,
volatile
liquids,
and are so
called
because
the
molecule
has six
carbon
atoms..
Nonane
::
Nonane
(n.) One of a group of
metameric
hydrocarbons
C9H20 of the
paraffin
series;
-- so
called
because
of the nine
carbon
atoms in the
molecule.
Normal
nonane
is a
colorless
volatile
liquid,
an
ingredient
of
ordinary
kerosene..
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