WordReference Random House Unabridged Dictionary of American English © 2026
pneumo-, 
  1. var. of pneumato- or pneumono-: pneumococcus.

Collins Concise English Dictionary © HarperCollins Publishers::
pneumo-, pneumono-, (before a vowel) pneum-, (before a vowel) pneumon- combining form
  1. of or related to a lung or the lungs; respiratory: pneumoconiosis, pneumonitis
Etymology: from Greek pneumōn lung or pneuma breath
'pneumo-' also found in these entries (note: many are not synonyms or translations):
pneumoconiosis - bronchial pneumonia - double pneumonia - lobar pneumonia - pneumato- - pneumobacillus - pneumococcus - pneumocystis pneumonia - pneumodynamics - pneumoencephalogram - pneumoencephalography - pneumogastric - pneumograph - pneumography - pneumono- - pneumothorax - pneumotropic

Forum discussions with the word(s) "pneumo-" in the title:


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