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.
Learner's definition of MODUS VIVENDI. [singular] formal. : an arrangement that helps people, groups, or countries work together peacefully even though they do not agree with each other. The two nations developed a modus vivendi in order to avoid war.