Equus caballus przewalskii equus·ca·bal·lusprzewalskii uncommon noun 1. wild horse of central Asia that resembles an ass; now endangered SynonymsPrzewalski's horsePrzevalski's horseEquus caballus przewalskiiEquus caballus przevalskii Related words Broader terms wild horse WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.