单词	rootlet
释义	rootlet noun root·​let ˈrüt-lət  ˈru̇t- : a small root see seedling illustration Example Sentences Recent Examples on the Web The coastal glaciers are like rootlets tendriling off the taproot of Greenland’s interior, the channels through which much of the ice is lost. Jonathan Nackstrand, National Geographic, 15 Oct. 2019 Splaying out some 18 feet from the base of their trunks and digging deep into the soil, the roots were sturdy, branched, and intricate, with delicate rootlets splaying from their tips. Katherine J. Wu, Smithsonian, 20 Dec. 2019 By contrast, the giant relatives of the Xinhang trees, which dominated swamps millions of years later, commonly had what are known as stigmarian roots, which split into branches surrounded by tiny rootlets. Deming Wang, National Geographic, 8 Aug. 2019 Wei-Haas reports that the Xinhang trees have stigmarian roots, or branching roots covered in rootlets. Jason Daley, Smithsonian, 9 Aug. 2019 The fungi grow underground, usually nestled in the deep, fine network of tiny rootlets of oak trees, in a special kind of symbiosis. Alejandra Borunda, National Geographic, 11 July 2019 The long radishes broke it up and drew nutrients toward the surface; tall grasses like sorghum produced numerous fine rootlets, adding organic material to the land; legumes harbored bacteria that put nitrogen into the soil. Moises Velasquez-manoff, New York Times, 18 Apr. 2018 See More Word History First Known Use circa 1793, in the meaning defined above Medical Definition rootlet noun root·​let -lət  : a small root also : one of the ultimate divisions of a nerve root
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