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index
noun
-
index
,
indices
,
indexing
,
indexes
,
indexed
in
mathematics
,
a
small
raised
number
or
letter
written
to
the
right
of
another
symbol
to
show
powers
or
particular
positions
•
In
5²
,
the
2
is
called
the
index
or
exponent
.
In
5²
,
the
2
is
called
the
index
or
exponent
.
•
A
negative
index
means
you
should
take
a
reciprocal
.
A
negative
index
means
you
should
take
a
reciprocal
.
Adopted
into
mathematical
language
in
18th
century
from
Latin
‘
index
’
meaning
‘
sign
’.
