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Definition of: CROUP
- (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.