noun (plural -noceroses; also -noceros or rhinoceri) see: horn Date: 14th century any of a family (Rhinocerotidae) of large heavyset herbivorous perissodactyl mammals of Africa and Asia that have one or two upright keratinous horns on the snout and thick gray to brown skin with little hair
rhinoceros beetle noun Date: 1681 any of various large chiefly tropical scarab beetles (subfamily Dynastinae) having projecting horns on thorax and head