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单词 metatracheal
释义

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metatracheal
metatracheal adj.
Brit. /ˌmɛtəˈtreɪkɪəl/
,
/ˌmɛtətrəˈkiːəl/
,
U.S. /ˌmɛdəˈtreɪkiəl/
[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.
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