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Noun
1. a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitides
(synonym) arbovirus
(hypernym) virus
(hyponym) Bunyaviridae

Although arbor sounds as if it should have something to do with trees, it doesn’t. It comes from the first 2 letters of "arthropod" + the first 3 letters of "borne." Arborviruses are transmitted (borne) to humans by mosquitoes and ticks (arthropods).

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Noun
1. a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitides
(synonym) arbovirus
(hypernym) virus
(hyponym) Bunyaviridae

Although arbor sounds as if it should have something to do with trees, it doesn’t. It comes from the first 2 letters of "arthropod" + the first 3 letters of "borne." Arborviruses are transmitted (borne) to humans by mosquitoes and ticks (arthropods).