Definition

1. Noun:
   • The woody vascular tissue in plants: Xylem is the complex plant tissue responsible for transporting water and dissolved minerals from the roots to the rest of the plant. It also provides structural support. It consists primarily of specialized cells like tracheids and vessels.

Usage Examples

• Noun:
  • The xylem in trees is responsible for moving water up to the leaves.
  • Scientists study the structure of xylem to understand plant hydraulics.
  • The rings visible in a tree trunk are formed by annual growth of xylem.

Advanced Usage

• "Xylem sap": The fluid, consisting primarily of water and dissolved minerals, that is transported through the xylem.

  • The composition of xylem sap changes throughout the growing season.

• "Primary xylem" and "secondary xylem": Terms describing the developmental stage of the tissue. Primary xylem is formed from the procambium during primary growth, while secondary xylem (wood) is formed from the vascular cambium during secondary growth.

  • The secondary xylem of a mature oak tree is what we commonly call wood.

Variants and Related Words

• Xylary (adj): Pertaining to or consisting of xylem.

  • The xylary elements were clearly visible under the microscope.

• Tracheid (n): A type of elongated cell in xylem with tapered ends and pits, involved in water transport and support, especially in conifers and ferns.

• Vessel element (n): A shorter, wider cell type in xylem that aligns end-to-end to form continuous tubes (vessels) for efficient water transport, common in flowering plants.

Synonyms

• Woody tissue (a general descriptive synonym, though less precise).
• Vascular tissue (a broader category that includes both xylem and phloem).

Related Idioms or Phrases

There are no common idioms or phrasal verbs specifically for the technical term "xylem".

Noun

1. the woody part of plants: the supporting and water-conducting tissue, consisting primarily of tracheids and vessels