单词 | head tree |
释义 | head treen. 1. Mining and Building. Originally: a horizontal supporting beam placed on top of one or more vertical props or posts. In later use also: a horizontal beam on two or more uprights. Cf. crown tree n. at crown n. Compounds 3a. ΘΚΠ the world > space > relative position > support > [noun] > that which supports > supporting beam or plank of wood skid1609 needle1684 head tree1747 sleeper1849 society > occupation and work > workplace > places where raw materials are extracted > mine > [noun] > prop or support crown tree1449 punch1462 prop1613 slider1653 sole1653 yoking1653 stow-blade1681 pit-bar1708 fork1747 head tree1747 studdle1758 lock piece1778 pit-prop1794 puncheon1815 stow-fork1824 plank tubbing1839 sprag1841 gib1847 chock1853 Tom1858 bratticing1866 pack1867 breastboard1877 brattice1881 wall-plate1881 strap1883 stretcher1883 1747 W. Hooson Miners Dict. sig. Giij The Side-pieces..have a collar on the Top-end in which the Head-tree resteth. 1879 C. F. Gripper Railway Tunnelling Heavy Ground iii. 15 Lacing boards spiked securely from head-tree to head-tree, and from side-tree to side-tree. 1921 Brit. Patent 159,318 1/2 A considerable quantity of timber is required for head trees, side trees, roof poling, wedges and so forth. 2003 Jrnl. Amer. Res. Center Egypt 40 28 He notes mine supports consisting of two upright stone slabs with a ‘cap’ or ‘headtree’. 2008 House Builders Health & Safety Man. §8. 17/2 Height should not be less than 1.2m measured from the top of the sills to the underside of the head tree. 2. U.S. Forestry. In a system where logs are hauled on an overhead cable slung from a number of trees: the tree located nearest the engine used for hauling. Cf. spar tree n. at spar n.1 Compounds 2. Now rare. ΘΚΠ the world > food and drink > farming > forestry or arboriculture > lumbering > [noun] > lumbering equipment > structure to which cable fixed head tree1894 spar tree1925 1894 Electr. Engineer 11 July 33/2 On the head tree two sheaves are placed, one on either side, and on the tail tree a 2-foot steel sheave is chained. 1921 Southern Lumberman 22 Oct. 42/1 The hauling rope after running through a block attached to the head tree is passed through a fall block and the end secured to the carriage. 3. With reference to certain tribal societies: a tall or prominent tree on which heads of decapitated enemies are hung as trophies. ΚΠ 1922 Nature 23 Mar. 393/2 [Assam.] In the middle of the village stands the head-tree, usually a ficus, on which heads taken in war were hung. 1994 Oceania 65 65 [West Timor.] The smoked heads would either be impaled on poles surrounding the cult house..or secured in the branches of the group's central ‘head tree’..adjacent to the cult house. 2005 B. B. Kumar Naga Identity ii. 41 An easily defensible place and a tree suitable to be the head-tree was necessary for selecting a site for founding the village. This entry has been updated (OED Third Edition, June 2013; most recently modified version published online March 2022). < n.1747 |
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