Hypertext Webster Gateway: "xylem"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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
phlo["e]m.
From WordNet (r) 1.7 (wn)
xylem
n : the woody part of plants: the supporting and
water-conducting tissue, consisting primarily of
tracheids and vessels
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