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valve definition
a
structure
in
a
hollow
organ
(like
the
heart)
with
a
flap
to
insure
one-way
flow
of
fluid
through
it
device
in
a
brass
wind
instrument
for
varying
the
length
of
the
air
column
to
alter
the
pitch
of
a
tone
control
consisting
of
a
mechanical
device
for
controlling
the
flow
of
a
fluid
the
entire
one-piece
shell
of
a
snail
and
certain
other
molluscs
one
of
the
paired
hinged
shells
of
certain
molluscs
and
of
brachiopods
來源 : wordnet
來源 : Trending