graywacke

英 ['ɡreɪ,wækə] 美 ['gre,wæk]
  • n. 杂砂岩;硬砂岩(等于greywacke)

英文词源


graywacke (n.)
also greywacke, 1806, partial translation of German grauwacke; see gray (adj.) + wacke.

单词首字母