\Small"pox`\, n. [Small + pox, pocks.] (Med.)
A contagious, constitutional, febrile disease characterized
by a peculiar eruption; variola. The cutaneous eruption is at
first a collection of papules which become vesicles (first
flat, subsequently umbilicated) and then pustules, and
finally thick crusts which slough after a certain time, often
leaving a pit, or scar.