1）sediment / ˈsedɪmənt; ˋsɛdəmənt/ n [U]
matter that settles to the bottom of a liquid 沉淀物: a wine with a gritty sediment 有沙粒状沉淀物的葡萄酒.
matter (eg sand, gravel, mud, etc) carried by water or wind and deposited on the surface of the land 沉积物（如沙﹑ 砾石﹑ 泥等）.
2）sedimentary / ˏsedɪˈmentrɪ; ˏsɛdəˋmɛntərɪ/ adj
of or like sediment; formed from sediment （似）沉淀物的; 由沉淀物形成的: sedimentary rocks, eg sandstone, limestone, slate 沉积岩（如砂岩﹑ 石灰岩﹑ 板岩）.
3）sedimentation / ˏsedɪmenˈteɪʃn; ˏsɛdəmɛnˋteʃən/ n [U]
(geology 地质) process of depositing sediment 沉淀; 沉积.