ˌ ̷ ̷ ̷ ̷ ̷ ̷ˈthirēəm noun
Usage: capitalized
Etymology: New Latin Hyrac-, Hyrax + -o- + -therium
: a genus of lower Eocene perissodactylous mammals about the size of a fox having four-toed forelimbs and three-toed hind limbs and regarded as among the earliest ancestors of the modern horse — see equidae illustration