Xylem

ботаника ксилема (основная проводящая ткань наземных растений)

Англо-русский научно-технический словарь

Xylem

noun Etymology: German, from Greek xylon a complex tissue in the vascular system of higher plants that consists of vessels, tracheids, or both usually together with wood fibers and parenchyma cells, functions chiefly in conduction of water and dissolved minerals but also in support and food storage, and typically constitutes the woody element (as of a plant stem) — compare phloem

Merriam-Webster's Collegiate Dictionary