The Collaborative International Dictionary
Morbillous
Morbillous \Mor*bil"lous\, a. [LL. morbilli measles, dim. of L. morbus disease: cf. F. morbilleux.] Pertaining to the measles; partaking of the nature of measels, or resembling the eruptions of that disease; measly.
Wiktionary
morbillous
a. Resembling or relating to measles.