respiratory syncytial virus
noun
- Medicine a paramyxovirus which causes disease of the respiratory tract. It is a major cause of bronchiolitis and pneumonia in young children, and may be a contributing factor in cot death.【医】副黏液病毒, 呼吸道合胞体病毒（儿童细支气管炎和肺炎的主要病因, 可能是婴儿猝死的部分原因）。