ech·o·vi·rus 
(ĕkō-vī′rəs)
(ĕkō-vī′rəs)n. pl. ech·o·vi·rus·es
Any of various enteroviruses of the gastrointestinal tract associated with certain diseases, such as viral meningitis, mild respiratory infections, and severe diarrhea in newborns.
[e(nteric) c(ytopathogenic) h(uman) o(rphan) virus.]