dasyurid marsupial: small carnivorous nocturnal marsupials of Australia and Tasmania
marsupial: mammals of which the females have a pouch (the marsupium) containing the teats where the young are fed and carried
ventricular septal defect: a common congenital heart defect; an abnormal opening in the septum dividing the ventricles allows blood to pass directly from the left to the right ventricle; large openings may cause congestive heart failure