首页  英汉  汉英  英英  词组  用法  例句  同义词  写作  俚语  缩写  词源  词根  法汉  德汉  日汉  俄汉  韩汉  西汉  意汉  泰汉  越汉

单词	notochord
释义	notochord noun no·​to·​chord ˈnō-tə-ˌkȯrd  : a longitudinal flexible rod of cells that in the lowest chordates (such as a lancelet or a lamprey) and in the embryos of the higher vertebrates forms the supporting axis of the body notochordal ˌnō-tə-ˈkȯr-dᵊl  adjective Example Sentences Recent Examples on the Web The tailfin and notochord — basically the sturgeon’s spine — is pulled out. oregonlive, 25 Aug. 2021 But that streak is important—it’s a notochord, or a precursor of our spinal column that marks Pikaia as one of the earliest relatives of vertebrates. Riley Black, Smithsonian Magazine, 10 Dec. 2020 But several fossils revealed that the band bore the hallmark traits of a notochord, the rubbery tube surrounding some primitive vertebrates’ spinal cords. Michael Greshko, National Geographic, 16 Mar. 2016 Instead what’s called a notochord, a flexible rod of tissue, extends along hagfish backs. Susan Milius, WIRED, 2 Mar. 2011 Word History Etymology Greek nōton, nōtos back + Latin chorda cord — more at cord First Known Use 1848, in the meaning defined above Medical Definition notochord noun no·​to·​chord ˈnōt-ə-ˌkȯ(ə)rd  : a longitudinal flexible rod of cells that in the lowest chordates (as a lancelet or a lamprey) and in the embryos of the higher vertebrates forms the supporting axis of the body, that is almost obliterated in the adult of the higher vertebrates as the bodies of the vertebrae develop, and that arises as an outgrowth from the dorsal lip of the blastopore extending forward between epiblast and hypoblast in the middorsal line
随便看	Tishah-b'Ab Tishchenko reaction Tishri tishris tism Tiso tissual tissue tissue culture tissue fluid tissue of lies tissue paper tissue plasminogen activator tissued tissues tissuey tissuing tissular tisswood tist tisty-tosty tiswin Tisza tit tit babbler

英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。