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xylem n. 木质部 木质部 xylem n 1: the woody part of plants: the supporting and water- conducting tissue, consisting primarily of tracheids and vessels Xylem \Xy"lem\, n. [Gr. xy`lon wood.] (Bot.) That portion of a fibrovascular bundle which has developed, or will develop, into wood cells; -- distinguished from {phloem}. [1913 Webster]
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