noun[ U ]informaluk/ɪˈkɒn.ə.mi.klɑːs ˌsɪn.drəʊm/us/ɪˈkɑː.nə.mi.klæs ˌsɪn.droʊm/
经济舱综合症(指因乘坐飞机导致静脉或肺部血管血液粘稠)
deep vein thrombosis (= a sticky mass of blood in the lungs or in the tubes that carry blood to the heart) that someone develops after travelling on a plane