\Croup\ (kr??p), n. [F. croupe hind quarters, croup, rump,
of German or Icel. origin; cf. Icel. kryppa hump; akin to
Icel. kroppr. Cf. {Crop}.]
The hinder part or buttocks of certain quadrupeds, especially
of a horse; hence, the place behind the saddle.
      So light to the croup the fair lady he swung, So light
      to the saddle before her he sprung.      --Sir W.
                                               Scott.

\Croup\ (kr??p), n. [Scot. croup, cf. croup, crowp, to
croak, to cry or speak with a hoarse voice; cf. also LG.
kropp, G. kropf, the crop or craw of a bird, and tumor on the
anterior part of the neck, a wen, etc. Cf. {Crop}.] (Med.)
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}.