Definition of pneumo- in English:

pneumo-

Syllabification: pneumo-

combining form

1Of or relating to the lungs: pneumogastric
2Of or relating to the presence of air or gas: pneumothorax

Origin

sense 1 from Greek pneumōn 'lung'; sense 2 from Greek pneuma 'air'.

Definition of pneumo- in:

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Word of the day hubris
Pronunciation: ˈ(h)yo͞obris
noun
excessive pride or self-confidence