Topic >> Animals: Mammals rhinocerosrhi‧noc‧er‧os /raɪˈnɑsərəs/ also rhi‧no /ˈraɪnoʊ/ noun [countable] Word Origin a large heavy animal with thick rough skin and one or two horns on its nose [Origin: 1200–1300 Latin, Greek, from rhis “nose” + keras “horn”]