metaxylem

柯林斯英漢雙解大詞典

metaxylem /ˌmɛtəˈzaɪlɛm/

1.N xylem tissue that consists of rigid thick-walled cells and occurs in parts of the plant that have finished growing 後生木質部 → compare protoxylem ^[1] 

It is found in protoxylem and first metaxylem tracheids and vessels.可在原生木質部和初始後生木質部的管胞和導管中見到。

Basipetal differentiation is seen in the formation of proto-and metaxylem in the stem.在莖原生木質部和次生木質部的形成過程中可以看到這種類型的分化。

The primitive exarch and diarch haplostele with cross-like metaxylem exists in the lower part of CNZ.在子葉節區下部存在原始的外始式二原型十字形單中柱。 ^[1]