sudden infant death syndrome

US /ˌsʌd.ən ˌɪn.fənt ˈdeθ ˌsɪn.droʊm/
UK /ˌsʌd.ən ˌɪn.fənt ˈdeθ ˌsɪn.droʊm/
"sudden infant death syndrome" picture
1.

the unexplained death, usually during sleep, of a seemingly healthy baby less than a year old

:
Parents are advised to place infants on their backs to sleep to reduce the risk of sudden infant death syndrome.
Research continues into the causes and prevention of sudden infant death syndrome.