astrovirus

noun

as·​tro·​vi·​rus ˌa-strə-ˈvī-rəs 

: any of a family (Astroviridae) of single-stranded RNA viruses that have a spherical virion with no lipid envelope and a five- or six-point star-shaped surface structure and that infect vertebrates causing gastroenteritis in humans and especially children

We conclude that astroviruses are medically important agents of gastroenteritis that produce clinical findings similar to those caused by rotavirus infection.

—John E. Herrmann et al., The New England Journal of Medicine