dome
noun [ C ] uk/dəʊm/ us/doʊm/
穹顶;穹顶建筑
a rounded roof on a building or a room, or a building with such a roof
半球形
a shape like one-half of a ball
Gerald had a long grey beard and a shiny bald dome (= head). 杰拉尔德留着长长的灰色胡须，头秃得锃亮。