Source : Webster's Revised Unabridged Dictionary (1913)

Pneumonia \Pneu*mo"ni*a\ (n[-u]*m[=o]"n[i^]*[.a]), n. [NL., fr.
   Gr. pneymoni`a, fr. pney`mwn, pl. pney`mones the lungs, also,
   pley`mwn, which is perh. the original form. Cf. {Pneumatio},
   {Pulmonary}.] (Med.)
   Inflammation of the lungs.

   Note:

   {Catarrhal pneumonia}, or {Broncho-pneumonia}, is
      inflammation of the lung tissue, associated with catarrh
      and with marked evidences of inflammation of bronchial
      membranes, often chronic; -- also called {lobular
      pneumonia}, from its affecting single lobules at a time.
      

   {Croupous pneumonia}, or ordinary pneumonia, is an acute
      affection characterized by sudden onset with a chill, high
      fever, rapid course, and sudden decline; -- also called
      {lobar pneumonia}, from its affecting a whole lobe of the
      lung at once. See under {Croupous}.

   {Fibroid pneumonia} is an inflammation of the interstitial
      connective tissue lying between the lobules of the lungs,
      and is very slow in its course, producing shrinking and
      atrophy of the lungs.

Croupous \Croup"ous\ (kr??p"?s), a. (Med.)
   Relating to or resembling croup; especially, attended with
   the formation of a deposit or membrane like that found in
   membranous croup; as, croupous laryngitis.

   {Croupous pneumonia}, pneumonia attended with deposition of
      fibrinous matter in the air vesicles of the lungs;
      ordinary acute pneumonia.