metaxylem: Meaning and Definition of

met•a•xy•lem

Pronunciation: (met"u-zī'lum, -lem), [key]
— n. Bot.
  1. the part of the primary xylem that is the last to be formed, usually having weblike or pitted surfaces.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.