From Longman Dictionary of Contemporary Englishappaloosaap‧pa‧loo‧sa /ˌæpəˈluːsə/ noun [countable]  American EnglishHBA a type of horse that is pale in colour, with dark spots
                                                    
                                                Examples from the Corpus
appaloosa• Jester was an appaloosa stallion who had a very close relationship with his owner.Origin appaloosa (1800-1900) Probably from Palouse, a Native American people of Washington and Idaho 
