chickenpox

 
Pronunciation: /ˈtʃɪkɪnpɒks/

noun

[mass noun]
  • an infectious disease causing a mild fever and a rash of itchy inflamed pimples which turn to blisters and then loose scabs. It is caused by the herpes zoster virus and mainly affects children. Also called varicella.

Origin:

early 18th century: probably so named because of its mildness, as compared to smallpox