单词 | cover-clay |
释义 | > as lemmascover-clay cover-clay n. a bed of clay covering the strata of a quarry, mine, etc. ΚΠ 1789 J. Williams Nat. Hist. Mineral Kingdom (1810) 146 In some places this species of compounded cover-clay contains specimens of all the strata found in the neighbourhood. < as lemmas |
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