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xiphoid
xiphoid process
Xizang
XL
Xmas
XML
Xmodem
Xn.
Xnty.
xoanon
Xochimilco
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XR
XS
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xylem
xy·lem [ zləm ]


noun 
Definition:
 
type of plant tissue: the woody supportive plant tissue that carries water and dissolved minerals from the roots through the stem and leaves
[Late 19th century. Via German < Greek xulon "wood"]
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