CARO Views 6 meanings found CARO most commonly denotes the Canadian Association of Radiation Oncology, while it is also used for organisations promoting responsible pet ownership, computer security research and niche sporting events. Medical Canadian Association of Radiation Oncology Miscellaneous Creative Analytic Reproductive Organic Companion Animal Responsible Ownership Academic & Science Computer Antivirus Research Organization Regional Canadian Association of Radiation Oncologists Canadian Association of Rally Obedience