chicken pox

from The Century Dictionary.

• noun A mild contagious eruptive disease, generally appearing in children; varicella.

from the GNU version of the Collaborative International Dictionary of English.

• (Med.) A mild, eruptive disease, generally attacking children only; varicella.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an acute contagious disease caused by herpes varicella zoster virus; causes a rash of vesicles on the face and body