any of a genus (Enterovirus) of picornaviruses, including the polioviruses, echoviruses, and coxsackieviruses
See enterovirus in American Heritage Dictionary 4
nounpl.en·ter·o·vi·rus·es
Any of a subgroup of picornaviruses, including polioviruses, coxsackieviruses, and echoviruses, that infect the gastrointestinal tract and often spread to other areas of the body, especially the nervous system.