Term ambarél yw ARBD a ddefnyddir i ddisgrifio sbectrwm o gyflyrau a briodweddir gan nam gwybyddol cronig oherwydd newidiadau i strwythur a gweithrediad yr ymennydd a briodolir i ddefnydd gormodol o alcohol dros amser.
ARBD is an umbrella term used to describe a spectrum of conditions characterised by chronic cognitive impairment due to changes in the structure and function of the brain attributed to excessive alcohol consumption over time.