metaxylem

[met-uh-zahy-luh m, -lem] /ˌmɛt əˈzaɪ ləm, -lɛm/
noun, Botany
1.
the part of the primary xylem that is the last to be formed, usually having weblike or pitted surfaces.
Origin
1900-05; meta- + xylem
British Dictionary definitions for metaxylem

metaxylem

/ˌmɛtəˈzaɪlɛm/
noun
1.
xylem tissue that consists of rigid thick-walled cells and occurs in parts of the plant that have finished growing Compare protoxylem