(archaic, virology) Any of the former family Papovaviridae, now split into the Papillomaviridae and Polyomaviridae families, of viruses that cause papillomas or polyomas in animals.

plural of troll army

(geology) Of a geologic epoch within the Permian period from about 299 to 270 million years ago; marked by the appearance of beetles and flies.

plural of Ripperologist