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chemical
adjective
related
to
chemistry
or
to
the
way
substances
interact
,
change
,
or
are
made
•
The
factory
released
chemical
waste
into
the
river
.
The
factory
released
chemical
waste
into
the
river
.
•
Vinegar
causes
a
chemical
reaction
when
mixed
with
baking
soda
.
Vinegar
causes
a
chemical
reaction
when
mixed
with
baking
soda
.
From
French
chimique
,
from
Medieval
Latin
chimicus
(
alchemist
),
ultimately
from
Arabic
al-kīmiyāʾ
(
alchemy
).
noun
a
substance
produced
by
or
used
in
chemistry
,
especially
one
that
has
been
artificially
prepared
•
The
lab
stores
dangerous
chemicals
in
a
locked
cabinet
.
The
lab
stores
dangerous
chemicals
in
a
locked
cabinet
.
•
Pesticides
are
chemicals
that
help
farmers
protect
their
crops
.
Pesticides
are
chemicals
that
help
farmers
protect
their
crops
.
Originally
referring
to
an
alchemist's
substance
;
sense
broadened
in
the
18th
century
to
any
substance
studied
in
chemistry
.
