An extensive division of Mammalia. It formerly included the Proboscidea, Hyracoidea, Perissodactyla, and Artiodactyla, but by later writers it is generally restricted to the two latter groups (Ungulata). They feed almost exclusively upon vegetation.
Source: Webster's dictionaryHerbivora is derived from the Latin herba meaning a small plant or herb, P.G.W. Glare, Ed. (1990) "The Oxford Latin Dictionary" page 791 and vora, from vorare, to eat or devour. Source: Internet