Definitions for xylemˈzaɪ ləm, -lɛm
Random House Webster's College Dictionary
xy•lemˈzaɪ ləm, -lɛm(n.)
a compound tissue in vascular plants that helps provide support and that conducts water and nutrients upward from the roots, consisting of tracheids, vessels, parenchyma cells, and woody fibers.
Origin of xylem:
1870–75; < G < Gk xýl(on) wood (see phloem )
the woody part of plants: the supporting and water-conducting tissue, consisting primarily of tracheids and vessels
A vascular tissue in land plants primarily responsible for the distribution of water and minerals taken up by the roots; also the primary component of wood.
Origin: From Xylem, from ξύλον.
that portion of a fibrovascular bundle which has developed, or will develop, into wood cells; -- distinguished from phloem
U.S. National Library of Medicine
Plant tissue that carries water up the root and stem. Xylem cell walls derive most of their strength from LIGNIN. The vessels are similar to PHLOEM sieve tubes but lack companion cells and do not have perforated sides and pores.