元となった辞書の項目
air parcel
noun
(physics,
meteorology)
An
imaginary
body
of
air
to
which
may
be
assigned
any
or
all
of
the
basic
dynamic
and
thermodynamic
properties
of
atmospheric
air.
A
parcel
is
large
enough
to
contain
a
very
great
number
of
molecules,
but
small
enough
so
that
the
properties
assigned
to
it
are
approximately
uniform
within
it
and
so
that
its
motions
with
respect
to
the
surrounding
atmosphere
do
not
induce
marked
compensatory
movements.
It
cannot
be
given
precise
numerical
definition,
but
a
cubic
foot
of
air
might
fit
well
into
most
contexts
where
air
parcels
are
discussed,
particularly
those
related
to
static
stability.
意味（1）
(physics,
meteorology)
An
imaginary
body
of
air
to
which
may
be
assigned
any
or
all
of
the
basic
dynamic
and
thermodynamic
properties
of
atmospheric
air.
A
parcel
is
large
enough
to
contain
a
very
great
number
of
molecules,
but
small
enough
so
that
the
properties
assigned
to
it
are
approximately
uniform
within
it
and
so
that
its
motions
with
respect
to
the
surrounding
atmosphere
do
not
induce
marked
compensatory
movements.
It
cannot
be
given
precise
numerical
definition,
but
a
cubic
foot
of
air
might
fit
well
into
most
contexts
where
air
parcels
are
discussed,
particularly
those
related
to
static
stability.
