azido group: the univalent group N3- derived from hydrazoic acid
group: (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
pelvic inflammatory disease: inflammation of the female pelvic organs (especially the Fallopian tubes) caused by infection by any of several microorganisms (chiefly gonococci and chlamydia); symptoms are abdominal pain and fever and foul-smelling vaginal discharge