xylem
xylem
UK[ˈzaɪləm]US[ˈzaɪləm]
n
the tissue in plants that carries water and dissolved minerals from the roots upwards and also helps to support the plant.
Etymology
the term 'xylem' was coined in the 19th century by the swiss botanist carl nägeli, who adapted it from the german word 'xylem'. this german term was itself derived from the greek word 'xylon', meaning 'wood'. the choice of root was logical, as the xylem constitutes the woody part of vascular plants, responsible for water transport and structural support. the adoption of this greek-derived term into international scientific vocabulary followed the standard practice of using classical roots to create precise, universal terminology in botany.
Analysis
the word is a simplex loanword from scientific german. it is not productively segmented using english spelling substrings.
Examples
the xylem vessels are responsible for transporting water from the roots to the leaves.
in trees, the older xylem becomes heartwood, which no longer conducts sap.
scientists studied the plant's xylem under a microscope to assess its water conductivity.