\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.