单词 | bed-rock |
释义 | bed-rockn. Geology (originally U.S.) The solid rock underlying alluvial and other superficial formations; also figurative bottom, lowest level. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > [noun] > bedrock shelf1671 stone-head1708 rock1719 rock bed1794 rock-bottom1797 rock-head1820 bed-rock1850 reef1869 the world > action or operation > adversity > [noun] > fall from prosperous or thriving condition > low condition or low point > lowest point low tide1608 low-water mark1651 falla1662 perigee1662 low point1749 bathos1759 nadir1793 pessimism1794 zero1821 bed-rock1883 rock-bottom1885 ultima Thule1976 1850 N. Kingsley Diary (1914) 154 We are in for seeing the bed rock all along the bottom. 1872 M. S. De Vere Americanisms 171 The miner..hopes to reach bed-rock, where gold is found in quantities. 1873 G. A. Lawrence Silverland 181 The material invariably waxes greatly richer as the ‘bed-rock’ is neared. 1879 Encycl. Brit. X. 745/1 In alluvial deposits the richest ground is usually found in contact with the bed rock. This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2020). < n.1850 |
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