measles virus n.
An RNA virus of the genus Morbillivirus that causes measles in humans. Also called rubeola virus.
The measles virus grows in the airways, in cells that line the throat and lungs.
It was still, however, a measles virus, capable of giving a person a measles-like illness.
You, for instance, couldn't catch tobacco mosaic virus, and the tobacco plant can't catch the measles virus.