Geology. Designating the Middle Cambrian epoch in (esp. western) North America; of or relating to this epoch. Cf. Acadian, adj. 2a.
单词 | θ5454 |
释义 | the world > the earth > structure of the earth > age or period > [noun] > primary or Palaeozoic > Cambrian (1) Albertan1921 Geology. Designating the Middle Cambrian epoch in (esp. western) North America; of or relating to this epoch. Cf. Acadian, adj. 2a. |
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