croup

n. inflammation of the larynx and trachea (often occurring in infants and young children); rump of a horse or other four-legged animal

This term also refers to the rump of a quadruped; see (Wiktionary). For the work of a casino employee, see croupier. Croup (sometimes referred to as croup syndrome or laryngotracheobronchitis) is a respiratory disease which afflicts infants and young children, typically aged between 3 months and 3 years. The respiratory symptoms are caused by inflammation of the larynx and upper airway, with resultant narrowing of the airway.
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Croup is a common childhood ailment. Typically, it arises from a viral infection of the larynx and is associated with mild upper [more]Croup - Community and Resources

Noun
1. a disease of infants and young children; harsh coughing and hoarseness and fever and difficult breathing
(synonym) spasmodic laryngitis
(hypernym) angina
2. the part of a quadruped that corresponds to the human buttocks
(synonym) hindquarters, croupe, rump
(hypernym) body part
(hyponym) haunch
(part-holonym) quadruped

(n.)
The hinder part or buttocks of certain quadrupeds, especially of a horse; hence, the place behind the saddle.
  

(n.)
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.