Knowledge center. Chickenpox (Chicken Pox) , also known as Varicella, is a very contagious infection caused by the varicella zoster virus. In several parts of the world it is just known as varicella. Patients develop a blister-like rash, which first appears on the face and trunk, and then spreads throughout the body.
Etymology[edit] Latin. See mode. modus â(plural modi) (law, obsolete) The arrangement of, or mode of expressing, the terms of a contract or conveyance.
modality. 1  the quality or state of being modal. 2  an attribute or circumstance that denotes mode or manner. 3  Also called mode. 4  Medicine/Medical. the application of a therapeutic agent, usually a physical therapeutic agent. 5  one of the primary forms of sensation, as vision or touch.