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单词 tracheid
释义 tracheid
 —tracheidal /treuh kee"i dl, tray'kee uyd"l/,  adj.  
 /tray"kee id/, n. Bot.
 an elongated, tapering xylem cell having lignified, pitted, intact walls, adapted for conduction and support. Cf. vessel (def. 5).
 [1870-75; TRACHE(A) + -ID3]
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