- Infectious - Communicable by contact, by a virus, or by a bodily
exhalation; catching; as, a contagious disease. - Conveying or generating disease; pestilential;
poisonous; as, contagious air. - Spreading or communicable from one to another; exciting
similar emotions or conduct in others.
- Infectious disease - A constitutional disease characterized by the
production of tubercles in the internal organs, and especially in the
lungs, where it constitutes the most common variety of pulmonary
consumption.