bluetongue
noun
blue·tongue ˈblü-ˌtəŋ 
: a virus disease chiefly of sheep that is marked by hyperemia, cyanosis, and by swelling and sloughing of the mucous membranes especially about the mouth and tongue and is caused by a reovirus (species Bluetongue virus of the genus Orbivirus)
Example Sentences
Recent Examples on the Web In 2007, the bluetongue virus—a disease spread by midge bites—began to sweep through herds of sheep and cattle across Europe. 
Popular Science, 20 May 2020 It is caused by two different viruses: epizootic hemorrhagic disease virus (EHD) and bluetongue virus. Sarah Ladd, The Courier-Journal, 22 Aug. 2019
Popular Science, 20 May 2020 It is caused by two different viruses: epizootic hemorrhagic disease virus (EHD) and bluetongue virus. Sarah Ladd, The Courier-Journal, 22 Aug. 2019 Word History
First Known Use
1863, in the meaning defined above
Medical Definition
bluetongue
noun
blue·tongue ˈblü-ˌtəŋ
: a noncontagious virus disease especially of sheep that is caused by a reovirus of the genus Orbivirus (species Bluetongue virus) transmitted by biting flies of the genus Culicoides and that is characterized by hyperemia and cyanosis and by swelling and sloughing of the mucous membranes especially about the mouth and tongue
called also soremuzzle