| 单词 | primordial cell |
| 释义 | > as lemmasprimordial cell primordial cell n. Biology (a) a cell, esp. in an undifferentiated state, which acts as the progenitor for other cell types (cf. stem cell n. (b) at stem n.1 Compounds 2); †(b) a plant cell in its most rudimentary form, without a cell wall, vacuoles, etc., consisting only of a mass of protoplasm (obsolete); also figurative. ΘΚΠ the world > plants > part of plant > cell or aggregate tissue > [noun] > cell > types of > initial cell primordial cell1845 initial1914 1845 R. Owen Odontography I. i. i. 13 Every secretive process and the development of the primordial cells of every tissue are due to changes produced in the liquor sanguinis. 1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. i. i. 5 It has hence become usual even to consider a protoplasmic body of this kind as a cell, and to designate it as a naked membraneless cell or Primordial Cell [Ger. primordiale Zelle]. 1893 in J. H. Barrows World's Parl. Relig. II. 1481 The primordial cell of organic Methodism is the class-meeting. ?1920 B. M. Patten Early Embryol. of Chick 108 Many structures which later become of great importance are not represented even by primordial cell aggregations. 2005 Los Angeles Times (Nexis) 20 Feb. a1 Tom had been reading about stem cells..and knew them to be the next frontier of medicine, the primordial cells that could become unblemished tissue of any type. < as lemmas |
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