tracheid
/ˈtreɪkiɪd/
noun
- A long, narrow, water-conducting cell found in the xylem of plants, with thick walls and tapered ends.
- Tracheids are the main water-transporting cells in conifers and ferns.
- Under a microscope, tracheids look like long tubes with pointed ends and spiral patterns on their walls.
- The wood of pine trees is mostly made up of tracheids, which give it strength and help move water.