-ˈgravə̇s, -räv-, -rāv- noun
Etymology: New Latin, literally, severe jaundice
1. : a condition marked by severe jaundice ; specifically : erythroblastosis
2. or icterus ne·o·na·to·rum -ˌnēənəˈtōrəm : a common fatal disease of newborn mules related to erythroblastosis fetalis in the human and due to sensitization of the horse dam to blood elements derived from the ass sire