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請輸入英文單字，中文詞皆可：
polymorphism 音標拼音: [p
,
ɑlim'ɔrfɪzəm] [p
,
ɑlim'ɔrfɪzm]
XDict
n
. 多形,同質異像,多形現象
PyDict
多形,同質異像,多形現象
Taiwan
MOE
computer
dictionary
(
moecomp
)
polymorphism
多型
WordNet
(
r
)
3
.
0
(
2006
) (
WordNet
)
polymorphism
n
1
: (
genetics
)
the
genetic
variation
within
a
population
that
natural
selection
can
operate
on
2
: (
chemistry
)
the
existence
of
different
kinds
of
crystal
of
the
same
chemical
compound
[
synonym
: {
polymorphism
},
{
pleomorphism
}]
3
: (
biology
)
the
existence
of
two
or
more
forms
of
individuals
within
the
same
animal
species
(
independent
of
sex
differences
)
The
Collaborative
International
Dictionary
of
English
v
.
0
.
48
(
gcide
)
Polymorphism
\
Pol
`
y
*
mor
"
phism
\,
n
.
1
. (
Crystallog
.)
Same
as
{
Pleomorphism
}.
[
1913
Webster
]
2
. (
Biol
.)
(
a
)
The
capability
of
assuming
different
forms
;
the
capability
of
widely
varying
in
form
.
(
b
)
Existence
in
many
forms
;
the
coexistence
,
in
the
same
locality
,
of
two
or
more
distinct
forms
independent
of
sex
,
not
connected
by
intermediate
gradations
,
but
produced
from
common
parents
.
[
1913
Webster
]
The
Free
On
-
line
Dictionary
of
Computing
(
foldoc
)
A
concept
first
identified
by
{
Christopher
Strachey
} (
1967
)
and
developed
by
Hindley
and
Milner
,
allowing
{
types
}
such
as
list
of
anything
.
E
.
g
.
in
{
Haskell
}:
length
:: [
a
] ->
Int
is
a
function
which
operates
on
a
list
of
objects
of
any
type
,
a
(
a
is
a
{
type
variable
}).
This
is
known
as
parametric
polymorphism
.
Polymorphic
typing
allows
strong
type
checking
as
well
as
generic
functions
. {
ML
}
in
1976
was
the
first
language
with
polymorphic
typing
.
Ad
-
hoc
polymorphism
(
better
described
as
{
overloading
})
is
the
ability
to
use
the
same
syntax
for
objects
of
different
types
,
e
.
g
. ""
for
addition
of
reals
and
integers
or
"-"
for
unary
negation
or
diadic
subtraction
.
Parametric
polymorphism
allows
the
same
object
code
for
a
function
to
handle
arguments
of
many
types
but
overloading
only
reuses
syntax
and
requires
different
code
to
handle
different
types
.
See
also
{
generic
type
variable
}.
In
{
object
-
oriented
programming
},
the
term
is
used
to
describe
a
{
variable
}
that
may
refer
to
objects
whose
{
class
}
is
not
known
at
{
compile
time
}
and
which
respond
at
{
run
time
}
according
to
the
actual
class
of
the
object
to
which
they
refer
.
(
2002
-
08
-
08
)
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