borreliosis
noun
bor·rel·i·o·sis
| \ bə-ˌrel-ē-ˈō-səs
, -ˌrē-l-
\
, -ˌrē-l-
\
plural borrelioses\ -ˌsēz
\
\
Medical Definition of borreliosis
: infection with or disease caused by a spirochete of the genus Borrelia
specifically
: lyme disease