1. (biology) a sharp decrease in the total number of species in a relatively short period of time

Encyclopedia: Mass extinction

• immunocompromised
• immunodeficiency
• immunodeficient
• immunoelectrophoresis
• immunofluorescence
• immunogen
• immunogenic
• immunogenicity
• immunoglobulin
• immunoglobulin A
• immunoglobulin D
• immunoglobulin E
• immunoglobulin G
• immunoglobulin M
• immunohistochemistry
• immunologic
• immunologic response
• immunological
• immunological disorder
• immunologically
• immunologist
• immunology
• immunopathology
• immunosuppressant
• immunosuppressed