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单词 rock bed
释义

rock bedn.

Brit. /ˈrɒkbɛd/, U.S. /ˈrɑkˌbɛd/
Origin: Formed within English, by compounding. Etymons: rock n.1, bed n.
Etymology: < rock n.1 + bed n.
1. A bed of rock; a rocky floor, bottom, or base; (in early use) spec. solid rock underlying loose deposits such as soil or alluvium; bedrock.
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
1794 J. Beresford tr. Virgil Æneid ix. 353 The sound shakes tow'ring Prochyta, And shakes Inarime's rock-bed, o'erlaid At Jove's command on huge Typhœus' limbs.
1845 P. J. Bailey Festus (ed. 2) 218 Ocean's depths He clove unto their rock-bed.
1862 A. C. Ramsay et al. Descr. Catal. Rock Specim. (ed. 3) 126 In some localities in Oxfordshire..the ‘Rock bed’ of the Marlstone becomes highly ferruginous.
1865 G. W. Gesner A. Gesner's Pract. Treat. Coal (ed. 2) ii. 33 When the soil is not deep, a circular excavation is made down to the rock bed, and a hollow log, or ‘gum’, as it is called, is placed in it on one end.
1883 E. P. Ramsay Food Fishes New S. Wales 42 A hard rock-bed with large loose stones.
1952 E. J. Pratt Towards Last Spike 42 She took three engines, sank them..down through the hidden lake To the rock bed.
1991 Climber & Hill Walker (BNC) Nov. 32 We set off across bare rock beds from our base camp beneath the steep snow slopes of the Mera La.
1999 W. L. Heat Moon River Horse ii. 44 Gritty, swirling currents have cut into the rock bed of the Canajoharie Creek.
2. figurative. The fundamental principles on which something is based. Cf. bed-rock n.
ΘΚΠ
the world > existence and causation > causation > basis or foundation > [noun] > basis or fundamental principle
principlea1398
basec1500
principium1550
primordial1610
basisa1616
element1655
radical1656
principe1669
seminiuma1676
ultimate1710
rock beda1853
ultimatum1858
rock-bottom1866
ultimity1898
a1853 F. W. Robertson Serm. (1855) 1st Ser. ii. 27 Frivolity has turned the heart into a rockbed of selfishness.
1883 Home Missionary Sept. 201 The religious conceptions which are the rockbed ideas of Christianity.
1907 R. Muther Hist. Mod. Painting ii. xv. 387 History itself..clings merely to the rock-bed of old costume... The..greatest generation had finally come to handle it quite familiarly and humanly and without affected dignity.
1985 J. Walsh & P. G. Walsh Divine Providence & Human Suffering App. vi. 254 Christ has set in it the rock-bed of a perpetual good—the good of eternal salvation.
This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).
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n.1794
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更新时间:2025/3/21 13:04:27