atherosclerosis
noun [ U ] medical specialized uk/ˌæθ.ə.rəʊ.skləˈrəʊ.sɪs/ us/ˌæθ.ə.roʊ.skləˈroʊ.sɪs/
动脉粥样硬化（症）
a form of arteriosclerosis (= hardening of the arteries, the thick tubes carrying blood from the heart) that is caused by a fatty substance building up inside the arteries