noun (n)

• a disease of infants and young children; harsh coughing and hoarseness and fever and difficult breathing(noun.state)

  Synonym:
  spasmodic laryngitis
  

  source: wordnet30
• the part of an animal that corresponds to the human buttocks(noun.animal)

  Synonym:
  croupe, hindquarters, rump
  

  source: wordnet30
• The hinder part or buttocks of certain quadrupeds, especially of a horse; hence, the place behind the saddle.(noun)

  source: webster1913
• An inflammatory affection of the larynx or trachea, accompanied by a hoarse, ringing cough and stridulous, difficult breathing; esp., such an affection when associated with the development of a false membrane in the air passages (also called membranous croup). See False croup, under False, and Diphtheria.(noun)

  source: webster1913