15-Letter Words Containing: A,T,R,O,C,I,O,U,S

• any of a group of herpes viruses that enlarge epithelial cells and can cause birth defects; can affect humans with impaired immunological systems

• an enzyme that catalyzes oxidation-reduction

• a morbid fear of being closed in a confined space

• light microscope that uses scattered light to show particles too small to see with ordinary microscopes

• evolution on a large scale extending over geologic era and resulting in the formation of new taxonomic groups