Attributive and in the genitive. Designating a transmissible soft-tissue tumour (fibroma or myxoma) of rabbits, the condition of having such a tumour or tumours, and the poxvirus (genus Leporipoxvirus) which causes such tumours.

Attributive and in the genitive. Designating a transmissible skin tumour (papilloma) of rabbits, the condition of having such a tumour or tumours, and the papillomavirus which causes such tumours.