ru·bel·la 
(r-bĕlə)
(r-bĕlə)n.
A mild contagious eruptive disease caused by a virus and capable of producing congenital defects in infants born to mothers infected during the first three months of pregnancy. Also called German measles.
[From Latin, neuter pl. of rubellus, red, from ruber; see reudh- in the Appendix of Indo-European roots.]