| 单词 | lias |
| 释义 | lias n. 1. (Lias) Geol. the lower strata of the Jurassic system of rocks, consisting of shales and limestones rich in fossils. 2. a blue limestone rock found in SW England. Derivatives liassic adj. (in sense 1). Etymology: ME f. OF liois hard limestone, prob. f. Gmc |
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