| 单词 | pit field | 
| 释义 | > as lemmaspit field   pit field  n. Botany = primary pit field n. at primary adj. and n. Compounds. ΘΚΠ the world > plants > part of plant > cell or aggregate tissue > 			[noun]		 > cell > parts of cell > cell wall and parts septum1720 pit1839 sieve-plate1875 sieve-pore1875 sieve-tube1875 anticlinal1882 periclinal1882 sieve-vessel1882 pit cavity1884 pit membrane1884 middle lamella1887 torus1887 tonoplast1895 pit canal1911 pit chamber1917 pit aperture1918 pit pair1933 pit field1934 margo1965 sieve-tissue- 1924    Philos. Trans. 		(Royal Soc.)	 B. 212 100  				The pits in the ‘field’ are simple and vary from one to three in number.]			 1934    S. J. Record Identification Timbers Temperate N. Amer.  i. 24  				A pit field may persist without the development of any pit-pairs on it, but usually there is one, often two, and sometimes three to six. 1976    P. Bell  & D. Coombe tr.  Strasburger's Textbk. Bot. 		(new ed.)	 63  				Where the pit fields are oval or elongated, the bordered pits take on a similar shape. 1997    Internat. Jrnl. Plant Sci. 158 101/2  				All cells were surrounded by a cell wall whose thickness was related to its location..and to the presence of pit fields. < as lemmas | 
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