Definitions

1. noun

A virus that is larger than the typical viruses in its class, often composed of many genes and having complex structures.

“The new ultravirus discovered by the scientists has 47 genes, making it the largest of its kind.”

2. noun

A hypothetical or theoretical concept of a virus that is much larger and more complex than any known virus.

“The idea of an ultravirus has been debated by virologists for decades, and some believe it could be the key to understanding the origins of life.”