单词 | metatracheal |
释义 | > as lemmasmetatracheal metatracheal adj. Brit. , U.S. [after German metatracheal (1908 in the source translated in quot. 1908); compare paratracheal adj.] Botany now rare designating parenchyma in wood that is arranged independently of the vessels in tangential bands (now usually called apotracheal); cf. paratracheal adj.ΘΚΠ the world > plants > part of plant > cell or aggregate tissue > [adjective] > of types of tissue parenchymatous1720 cinenchymatous1835 bothrenchymatous1839 uniporous1840 pleurenchymatous1842 prosenchymatous1842 discigerous1844 collenchymatous1884 metatracheal1908 paratracheal1908 1908 L. A. Boodle & F. E. Fritsch tr. H. Solereder Syst. Anat. Dicotyledons II. Concl. Rem. §45. 1143 The wood parenchyma generally forms tangential bands (known as the ‘metatracheal’ parenchyma in contrast to the ‘paratracheal’ parenchyma, aggregated round about the vessels). 1917 Jrnl. Forestry 15 179 The parenchyma is strikingly metatracheal in its distribution. 1950 C. R. Metcalfe & L. Chalk Anat. Dicotyledons I. Introd. p. xxiv Bailey suggests that the word ‘metatracheal’ should be dropped, owing to the different senses in which it has been used, in favour of ‘banded’. 1970 K. Wilson & D. J. B. White Jane's Struct. Wood (ed. 2) vi. 116 Apotracheal parenchyma may occur as..tangentially arranged sheets of cells..or in more extensive tangential bands... The two latter types are sometimes referred to as metatracheal parenchyma but this term is better avoided. 1982 Bot. Gaz. 143 397/1 Axial parenchyma..occasionally occurring in indistinct uniseriate metatracheal bands. < as lemmas |
随便看 |
英语词典包含1132095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。