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3 definitions found
From:
DICT.TW English-Chinese Medical Dictionary 英漢醫學字典
air sac
名詞
肺泡,氣囊
From:
Webster's Revised Unabridged Dictionary (1913)
Air sac
1.
Anat.
One
of
the
spaces
in
different
parts
of
the
bodies
of
birds
,
which
are
filled
with
air
and
connected
with
the
air
passages
of
the
lungs
;
an
air
cell
.
◄
►
From:
WordNet (r) 2.0
air
sac
n
1:
a
tiny
sac
for
holding
air
in
the
lungs
;
formed
by
the
terminal
dilation
of
tiny
air
passageways
[
syn
:
alveolus
,
air cell
]
2:
any
of
the
thin-walled
extensions
of
the
tracheae
of
insects
3:
any
of
the
membranous
air-filled
extensions
of
the
lungs
of
birds
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