alluviumn.
英 ə'l(j)uːvɪəm | 美 ə'lʊvɪəm
中文n. [地质] 冲积层，冲积土
词根词源
alluvium (n.)"matter deposited by flowing water," 1660s, from Medieval Latin alluvium, neuter of alluvius "washed against," from Latin alluere "wash against," from ad- "to, against" (see ad-) + -luere, comb. form of lavere "to wash" (see lave).
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