9 letters · 14 points in Scrabble
noun 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
originFrom ar(thropod) + bo(rne) + virus.
Etymology from Wiktionary, CC BY-SA 3.0