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dioxide
noun
-
dioxide
,
dioxiding
,
dioxides
,
dioxided
a
chemical
compound
consisting
of
one
atom
of
another
element
combined
with
two
atoms
of
oxygen
.
•
Carbon
dioxide
is
a
greenhouse
gas
produced
by
burning
fossil
fuels
.
Carbon
dioxide
is
a
greenhouse
gas
produced
by
burning
fossil
fuels
.
•
During
photosynthesis
,
plants
absorb
carbon dioxide
from
the
air
.
During
photosynthesis
,
plants
absorb
carbon dioxide
from
the
air
.
Early
19th
century
:
back-formation
from
'deoxidize'
,
or
from
French
'dioxyde'
,
alteration
of
'acide
oxyde'
(
oxide
acid
),
from
Greek
'di-'
(
twice
)
+
'oxus'
(
sharp
,
acid
).
hydroxide
noun
a
chemical
compound
containing
one
or
more
hydroxide
groups
(
OH
)
bound
to
a
metal
or
other
positive
ion
.
•
Sodium
hydroxide
is
a
strong
alkali
used
in
soap
making
.
Sodium
hydroxide
is
a
strong
alkali
used
in
soap
making
.
•
The
farmer
spread
calcium
hydroxide
on
the
field
to
neutralize
acidic
soil
.
The
farmer
spread
calcium
hydroxide
on
the
field
to
neutralize
acidic
soil
.
Coined
in
1812
by
German
chemist
Leopold
Gmelin
from
'hydro-'
(
from
hydrogen
)
+
'oxide'
,
referring
to
the
OH
group
.
monoxide
noun
a
chemical
compound
that
consists
of
one
atom
of
oxygen
joined
to
one
atom
of
another
element
.
•
Carbon
monoxide
is
produced
when
fuels
burn
incompletely
.
Carbon
monoxide
is
produced
when
fuels
burn
incompletely
.
•
Installing
a
carbon monoxide
detector
saved
the
family
from
poisoning
.
Installing
a
carbon monoxide
detector
saved
the
family
from
poisoning
.
Mid
19th
century
:
blend
of
mono-
'one'
+
oxide
.
