WordNet: air cell, air sac, alveolus

a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways

• hypernym sac

• part holonym lung

air cell

• (suomi) ilmasolu (synonyymi; <unconfirmed/>)

air sac

• (suomi) ilmapussi (synonyymi)

alveolus

• (englanti) alveolate (derivationally related)
• (suomi) keuhkorakkula (synonyymi)