measles - n.pl. (also treated as sing.)
1 a an acute
infectious viral disease marked by
red spots on the skin. b the spots of
measles.
2 a tapeworm disease of pigs.
[ME masele(s) prob. f. MLG masele, MDu. masel pustule (cf. Du. mazelen measles), OHG masala: change of form prob. due to assim. to ME meser leper] 
