| 单词 | headwall |
| 释义 | > as lemmasheadwall headwall n. (a) chiefly Architecture and Civil Engineering a supporting, protecting, or retaining wall built at the front or top of a structure, area, etc.; (b) Physical Geography and Mountaineering a steep rock slope at the head of a valley; esp. a rock face or cliff at the back of a corrie. ΘΚΠ the world > space > relative position > support > [noun] > that which supports > a retaining wall headwall1659 retaining wall1771 wing-wall1791 the world > the earth > land > landscape > high land > cliff > [noun] > other cliffs by-cliff1596 undercliff1829 headwall1875 rock pitch1897 1659 T. Willsford Architectonice 8 Part of..[the] head wall..is brick. 1794 J. Sinclair Statist. Acct. Scotl. XII. 476 Next above the farm-steadings, are the Outfields,..separated from the hill or moor by a head-wall. 1875 Overland Monthly Jan. 69/1 Its eastern slopes are longer in shadow than the western, consequently the ice-wombs of the former are deeper and their head-walls are sheerer. 1891 Official Gaz. (U.S. Patent Office) 11 Aug. 726/2 A head-wall dividing a water-way into upper and lower levels [in a lock]. 1971 C. Bonington Annapurna South Face xv. 192 I climbed the initial icefield, then up the first rock groove... I was now below the final headwall of the Flat Iron. 1990 Mountain Nov. 23/3 Tuckerman's Ravine has climbable ice in November and December but fills with snow later on, much to the delight of the skiing enthusiast who attempts the famous headwall. 2004 T. Hald et al. in R. Robinson & B. Thagesen Road Engin. for Devel. x. 195 Most culverts have an upstream headwall and terminate downstream with an endwall. < as lemmas |
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