an infectious viral disease, usu affecting children, marked by a rash of distinct red circular spots and high fever
infestation with larval tapeworms, esp in pigs or pork
[(sense 1) Middle English meseles, pl of mesel spot characteristic of measles, an alteration (influenced by mesel leper) of masel; (sense 2) Middle English mesel infested with tapeworms or leprous, via Old French from Latin misellus leper, wretch, dimin. of miser miserable]