rootletn.

Brit.

/ˈruːtlᵻt/, U.S.

/ˈrutlət/,

/ˈrʊtlət/

Origin: Formed within English, by derivation. Etymons: root n.¹, -let suffix.

Etymology: < root n.¹ + -let suffix. Compare earlier rootling n., and also radicle n., radicule n., radicula n. and foreign-language forms cited at those entries. In sense 3 probably after French radicule (see radicle n.).

a. A slender subsidiary root; a branch of the primary root of a plant. Also: any of the small lateral roots produced for support by ivy and certain other climbing plants. In early use also: †= radicle n. 1a (obsolete). Also figurative and in figurative contexts.

ΘΚΠ

the world > plants > part of plant > root > [noun] > rootlet, fibre, or subsidiary root

string1398

by-root1578

fillet1601

taw1615

tapon1641

fibre1656

fang1664

fibril1664

rootlinga1706

lateral root1724

rootlet1783

radicle1793

radicel1819

viver1877

branch-root1884

sprangle1896

thong1927

1783 Syst. Veg. I. 8 Vegetation is produced by the Rootlets sucking up the aqueous tincture of the Soil.

1793 T. Martyn Lang. Bot. sig. Q8 Root-leaf and Rootlet are more proper in English than Radical leaf and Radicle.

1827 H. Steuart Planter's Guide (1828) 237 Every effort must be made to preserve the minutest fibres and capillary rootlets entire.

1878 T. L. Cuyler Pointed Papers 170 The soul thus reaches down through its every rootlet into Christ's deep, cool well.

1888 J. Inglis Tent Life Tigerland 116 A fine old fig-tree, with numberless tendrils and rootlets hanging pendant.

a1933 J. A. Thomson Biol. for Everyman (1934) II. 1425 The ivy clings by its numerous aërial rootlets.

1973 Time 25 June e7/2 Imagine a great green heart beating slowly beneath the earth, with every rootlet and capillary in the village pulsating to it.

2004 Plant Physiol. 136 3771 Cluster roots are groups of short, secondary, lateral rootlets that are covered with a dense mat of root hairs.

b. As a mass noun: rootlets or thin roots collectively. Now rare.

ΚΠ

1848 Brit. Farmer's Mag. 13 344/1 The essential development of rootlet rather that leaf accumulation, as a means of obtaining the turnip in agricultural quantity.

1894 S. Baring-Gould Deserts S. France I. 23 To combine with their delicate lacings of rootlet to keep the soil in place.

1909 Warbler 5 17 In astonishing contrast with the mere mats of rootlet which formed excuse for nests in the hollows..these nests amid the leaves were fairly well-made.

2. Malting. The radicle of a steeped grain. Also: such radicles collectively.

ΘΚΠ

the world > food and drink > drink > manufacture of alcoholic drink > malting > [noun] > germination > radicle

culm1440

rootlet1803

1803 Let. to Commissioners of Supply, & Landholders Stirling 17 The additional saccharine substance thereby obtained, scarcely compensates the loss of spirit evaporated during the drying, and part of the rootlets which are rubbed off in the turning.

1830 M. Donovan Domest. Econ. I. iv. 83 The moment the rootlet makes its appearance, the vegetation is stopped.

1860 E. S. White Maltster's Guide 62 Floor charges occasionally arise from the rank growth of rootlet.

1914 Times 8 June 30/2 When loaded to the kiln the so-called ‘green’ malt has a number of well-developed rootlets.

1953 Econ. Bot. 7 19/2 The malt is then dumped into hoppers below the kiln, cleaned to remove rootlets, and conveyed to storage.

2001 Tasmanian Country (Austral.) (Nexis) 10 Aug. Temperatures in the kilns are increased slowly to reduce grain moisture levels to about 4 per cent before the malt is cooled and the rootlets are removed.

3. Anatomy. A small branch of a blood vessel, nerve, etc.; a radicle (radicle n. 3); spec. any of the smaller fascicles of fibres into which the roots of the spinal nerves and certain cranial nerves are divided at the point of leaving or entering the spinal cord or brain.

ΘΚΠ

the world > life > the body > nervous system > nerve > parts of nerves > [noun] > branch

rame1578

surcle1578

ramus1615

sprig1634

twig1683

ramus communicans1798

rootlet1815

radicle1829

nerve twig1865

arm1870

radical1880

neuropilema1891

neuropil1894

the world > life > the body > vascular system > blood vessel > [noun] > branch

branch-veinc1400

eye vein1545

surcle1578

tendron1578

propagation1615

twig1683

radicle1829

rootlet1875

radical1880

1815 J. Gordon Syst. Human Anat. I. 212 Each of the rootlets or first bundles of Fasciculi is embraced by Pia Mater.

1875 Encycl. Brit. I. 903/1 The veins corresponding to them are rootlets of the inferior vena cava.

1889 E. Klein Elements Histol. (new ed.) xi. 92 The rootlets of the lymphatics are situated in the connective tissue of the different organs.

1899 T. C. Allbutt et al. Syst. Med. VI. 768 The rootlets of the third nerve pass archwise through the tegmentum cruris.

1930 H. G. Newth Marshall & Hurst's Junior Course Pract. Zool. (ed. 11) xiv. 393 The glosso-pharyngeal and pneumogastric nerves arise close together, by many slender rootlets, from the side of the medulla.

2003 Neurosurgery 52 1400 The rootlets of the GPhN [= glossopharyngeal nerve] emerge from the postolivary sulcus.

This entry has been updated (OED Third Edition, November 2010; most recently modified version published online June 2022).

单词	rootlet
释义	rootletn. Brit. /ˈruːtlᵻt/, U.S. /ˈrutlət/, /ˈrʊtlət/ Origin: Formed within English, by derivation. Etymons: root n.¹, -let suffix. Etymology: < root n.¹ + -let suffix. Compare earlier rootling n., and also radicle n., radicule n., radicula n. and foreign-language forms cited at those entries. In sense 3 probably after French radicule (see radicle n.). 1. a. A slender subsidiary root; a branch of the primary root of a plant. Also: any of the small lateral roots produced for support by ivy and certain other climbing plants. In early use also: †= radicle n. 1a (obsolete). Also figurative and in figurative contexts. ΘΚΠ the world > plants > part of plant > root > [noun] > rootlet, fibre, or subsidiary root string1398 by-root1578 fillet1601 taw1615 tapon1641 fibre1656 fang1664 fibril1664 rootlinga1706 lateral root1724 rootlet1783 radicle1793 radicel1819 viver1877 branch-root1884 sprangle1896 thong1927 1783 Syst. Veg. I. 8 Vegetation is produced by the Rootlets sucking up the aqueous tincture of the Soil. 1793 T. Martyn Lang. Bot. sig. Q8 Root-leaf and Rootlet are more proper in English than Radical leaf and Radicle. 1827 H. Steuart Planter's Guide (1828) 237 Every effort must be made to preserve the minutest fibres and capillary rootlets entire. 1878 T. L. Cuyler Pointed Papers 170 The soul thus reaches down through its every rootlet into Christ's deep, cool well. 1888 J. Inglis Tent Life Tigerland 116 A fine old fig-tree, with numberless tendrils and rootlets hanging pendant. a1933 J. A. Thomson Biol. for Everyman (1934) II. 1425 The ivy clings by its numerous aërial rootlets. 1973 Time 25 June e7/2 Imagine a great green heart beating slowly beneath the earth, with every rootlet and capillary in the village pulsating to it. 2004 Plant Physiol. 136 3771 Cluster roots are groups of short, secondary, lateral rootlets that are covered with a dense mat of root hairs. b. As a mass noun: rootlets or thin roots collectively. Now rare. ΚΠ 1848 Brit. Farmer's Mag. 13 344/1 The essential development of rootlet rather that leaf accumulation, as a means of obtaining the turnip in agricultural quantity. 1894 S. Baring-Gould Deserts S. France I. 23 To combine with their delicate lacings of rootlet to keep the soil in place. 1909 Warbler 5 17 In astonishing contrast with the mere mats of rootlet which formed excuse for nests in the hollows..these nests amid the leaves were fairly well-made. 2. Malting. The radicle of a steeped grain. Also: such radicles collectively. ΘΚΠ the world > food and drink > drink > manufacture of alcoholic drink > malting > [noun] > germination > radicle culm1440 rootlet1803 1803 Let. to Commissioners of Supply, & Landholders Stirling 17 The additional saccharine substance thereby obtained, scarcely compensates the loss of spirit evaporated during the drying, and part of the rootlets which are rubbed off in the turning. 1830 M. Donovan Domest. Econ. I. iv. 83 The moment the rootlet makes its appearance, the vegetation is stopped. 1860 E. S. White Maltster's Guide 62 Floor charges occasionally arise from the rank growth of rootlet. 1914 Times 8 June 30/2 When loaded to the kiln the so-called ‘green’ malt has a number of well-developed rootlets. 1953 Econ. Bot. 7 19/2 The malt is then dumped into hoppers below the kiln, cleaned to remove rootlets, and conveyed to storage. 2001 Tasmanian Country (Austral.) (Nexis) 10 Aug. Temperatures in the kilns are increased slowly to reduce grain moisture levels to about 4 per cent before the malt is cooled and the rootlets are removed. 3. Anatomy. A small branch of a blood vessel, nerve, etc.; a radicle (radicle n. 3); spec. any of the smaller fascicles of fibres into which the roots of the spinal nerves and certain cranial nerves are divided at the point of leaving or entering the spinal cord or brain. ΘΚΠ the world > life > the body > nervous system > nerve > parts of nerves > [noun] > branch rame1578 surcle1578 ramus1615 sprig1634 twig1683 ramus communicans1798 rootlet1815 radicle1829 nerve twig1865 arm1870 radical1880 neuropilema1891 neuropil1894 the world > life > the body > vascular system > blood vessel > [noun] > branch branch-veinc1400 eye vein1545 surcle1578 tendron1578 propagation1615 twig1683 radicle1829 rootlet1875 radical1880 1815 J. Gordon Syst. Human Anat. I. 212 Each of the rootlets or first bundles of Fasciculi is embraced by Pia Mater. 1875 Encycl. Brit. I. 903/1 The veins corresponding to them are rootlets of the inferior vena cava. 1889 E. Klein Elements Histol. (new ed.) xi. 92 The rootlets of the lymphatics are situated in the connective tissue of the different organs. 1899 T. C. Allbutt et al. Syst. Med. VI. 768 The rootlets of the third nerve pass archwise through the tegmentum cruris. 1930 H. G. Newth Marshall & Hurst's Junior Course Pract. Zool. (ed. 11) xiv. 393 The glosso-pharyngeal and pneumogastric nerves arise close together, by many slender rootlets, from the side of the medulla. 2003 Neurosurgery 52 1400 The rootlets of the GPhN [= glossopharyngeal nerve] emerge from the postolivary sulcus. This entry has been updated (OED Third Edition, November 2010; most recently modified version published online June 2022). < n.1783
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