Definition of Factorial
Fac`to´ri`al
a.
1.
Of
or
pertaining
to
a
factory
.
2.
(Math.)
Related
to
factorials
.
n.
1.
(Math.)
A
name
given
to
the
factors
of
a
continued
product
when
the
former
are
derivable
from
one
and
the
same
function
F
(
x
)
by
successively
imparting
a
constant
increment
or
decrement
h
to
the
independent
variable
.
Thus
the
product
F
(
x
).
F
(
x
+
h
).
F
(
x
+
2h
) . . .
F
[
x
+ (
n-1
)
h
]
is
called
a
factorial term
,
and
its
several
factors
take
the
name
of
factorials
.
2.
The
product
of
the
consecutive
whole
numbers
from
unity
up
to
any
given
number
;
thus
,
5
factorial
is
the
product
of
5
times
four
times
three
times
two
times
one
,
or
120
.
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Facingly
Facinorous
Facound
Facsimile
Facsimile telegraph
Fact
fact-finding
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factorize
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Factory
Factory leg
factory-made
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factual
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Facular
Facultative
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Faculty of advocates
Facund
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Facundity
Fad
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