pneumoniæ

Noun

pneumonia (usually uncountable, plural pneumonias or pneumoniæ or pneumoniae)

1. (usually) Inflammation of the lungs caused by viruses, bacteria or other infectious microorganisms.
   • He had always been remarkably immune from such little ailments, and had only once in his life been ill, of a vicious pneumonia long ago at school.1922, Michael Arlen, “2/9/1”, in “Piracy”: A Romantic Chronicle of These Days